Added HUD for Tahoe

Sources/Controllers/AppDelegate.h

@@ -11,6 +11,7 @@
 
 #import <Sparkle/Sparkle.h>
 
+#import "TahoeVolumeHUD.h"
 #import "iTunes.h"
 // #import "Music.h"
 #import "Spotify.h"
@@ -18,14 +19,11 @@
 
 @class IntroWindowController, AccessibilityDialog, StatusBarItem, PlayerApplication, SystemApplication;
 
-@interface AppDelegate : NSObject <NSApplicationDelegate, NSMenuItemValidation, SPUUpdaterDelegate, SPUStandardUserDriverDelegate> {
+@interface AppDelegate : NSObject <NSApplicationDelegate, NSMenuItemValidation, SPUUpdaterDelegate, SPUStandardUserDriverDelegate, TahoeVolumeHUDDelegate> {
-    CALayer *mainLayer;
     CALayer *volumeImageLayer;
-    CALayer *iconLayer;
     CALayer *volumeBar[16];
     
     NSImage *imgVolOn,*imgVolOff;
-    NSImage *iTunesIcon,*spotifyIcon;
     
     NSUserDefaults *preferences;
     
@@ -122,6 +120,6 @@
 @property (assign, nonatomic) double currentVolume;
 @property (assign, nonatomic) double oldVolume;
 @property (assign, nonatomic) double doubleVolume;
-
+@property (assign, nonatomic) NSImage* icon;
 
 @end

Sources/Controllers/AppDelegate.m

@@ -1,4 +1,5 @@
 //
+//
 //  AppDelegate.m
 //  iTunes Volume Control
 //
@@ -9,6 +10,7 @@
 #import "AppDelegate.h"
 #import "SystemVolume.h"
 #import "AccessibilityDialog.h"
+#import "TahoeVolumeHUD.h"
 
 #import <IOKit/hidsystem/ev_keymap.h>
 #import <ServiceManagement/ServiceManagement.h>
@@ -97,7 +99,7 @@ CGEventRef event_tap_callback(CGEventTapProxy proxy, CGEventType type, CGEventRe
                        keyCode == NX_KEYTYPE_SOUND_UP ||
                        keyCode == NX_KEYTYPE_SOUND_DOWN);
     
-    if(isMediaKey) {
+    if(isMediaKey /*&& keyModifier==1114111*/) {
         // Hand off all actual logic to main thread
         dispatch_async(dispatch_get_main_queue(), ^{
             AppDelegate *app = (__bridge AppDelegate *)refcon;
@@ -160,6 +162,7 @@ CGEventRef event_tap_callback(CGEventTapProxy proxy, CGEventType type, CGEventRe
 @implementation PlayerApplication
 
 @synthesize currentVolume = _currentVolume;
+@synthesize icon = _icon;
 
 - (void) setCurrentVolume:(double)currentVolume
 {
@@ -205,12 +208,12 @@ CGEventRef event_tap_callback(CGEventTapProxy proxy, CGEventType type, CGEventRe
 	return [musicPlayer playerState];
 }
 
--(id)initWithBundleIdentifier:(NSString*) bundleIdentifier {
+-(id)initWithBundleIdentifier:(NSString*) bundleIdentifier andIcon:(NSImage*)icon {
 	if (self = [super init])  {
 		[self setCurrentVolume: -100];
 		[self setOldVolume: -1];
 		musicPlayer = [SBApplication applicationWithBundleIdentifier:bundleIdentifier];
-
+        [self setIcon:icon];
 	}
 	return self;
 }
@@ -625,8 +628,10 @@ static NSTimeInterval updateSystemVolumeInterval=0.1f;
 
             if(!_hideVolumeWindow){
                 if (@available(macOS 16.0, *)) {
-                    // Running on Tahoe (2026) or newer
+                    // On Tahoe, show the new popover HUD.
+                    [[TahoeVolumeHUD sharedManager] showHUDWithVolume:0 usingMusicPlayer:runningPlayerPtr andLabel:[systemAudio getDefaultOutputDeviceName]  anchoredToStatusButton:self.statusBar.button];
                 } else {
+                    // On older systems, use the classic OSD.
                     id osdMgr = [self->OSDManager sharedManager];
                     if (osdMgr) {
                         [osdMgr showImage:OSDGraphicSpeakerMute onDisplayID:CGSMainDisplayID() priority:OSDPriorityDefault msecUntilFade:1000 filledChiclets:0 totalChiclets:(unsigned int)100 locked:NO];
@@ -641,12 +646,14 @@ static NSTimeInterval updateSystemVolumeInterval=0.1f;
 			if (_LockSystemAndPlayerVolume && runningPlayerPtr != systemAudio) {
 				[systemAudio setCurrentVolume:[systemAudio oldVolume]];
 			}
-
+            
-			if(!_hideVolumeWindow)
+            if(!_hideVolumeWindow)
             {
                 if (@available(macOS 16.0, *)) {
-                    // Running on Tahoe (2026) or newer
+                    // On Tahoe, show the new popover HUD.
+                    [[TahoeVolumeHUD sharedManager] showHUDWithVolume:[runningPlayerPtr oldVolume] usingMusicPlayer:runningPlayerPtr andLabel:[systemAudio getDefaultOutputDeviceName] anchoredToStatusButton:self.statusBar.button];
                 } else {
+                    // On older systems, use the classic OSD.
                     id osdMgr = [self->OSDManager sharedManager];
                     if (osdMgr) {
                         [osdMgr showImage:OSDGraphicSpeaker onDisplayID:CGSMainDisplayID() priority:OSDPriorityDefault msecUntilFade:1000 filledChiclets:(unsigned int)[runningPlayerPtr oldVolume] totalChiclets:(unsigned int)100 locked:NO];
@@ -733,18 +740,15 @@ static NSTimeInterval updateSystemVolumeInterval=0.1f;
         self->OSDManager = NSClassFromString(@"OSDManager");
     }
 
-	//[self checkSIPforAppIdentifier:@"com.apple.iTunes" promptIfNeeded:YES];
+    if (@available(macOS 16.0, *)) {
-	//[self checkSIPforAppIdentifier:@"com.spotify.client" promptIfNeeded:YES];
+        iTunes = [[PlayerApplication alloc] initWithBundleIdentifier:@"com.apple.Music" andIcon:[NSImage imageNamed:@"AppleMusicTahoe"]];
+    } else {
+        iTunes = [[PlayerApplication alloc] initWithBundleIdentifier:@"com.apple.iTunes" andIcon:[NSImage imageNamed:@"AppleMusicSequoia"]];
+    }
+	
+    spotify = [[PlayerApplication alloc] initWithBundleIdentifier:@"com.spotify.client" andIcon:[NSImage imageNamed:@"spotify"]];
 
-	if (@available(macOS 10.15, *)) {
+    doppler = [[PlayerApplication alloc] initWithBundleIdentifier:@"co.brushedtype.doppler-macos" andIcon:[NSImage imageNamed:@"doppler"]];
-		iTunes = [[PlayerApplication alloc] initWithBundleIdentifier:@"com.apple.Music"];
-	} else {
-		iTunes = [[PlayerApplication alloc] initWithBundleIdentifier:@"com.apple.iTunes"];
-	}
-
-	spotify = [[PlayerApplication alloc] initWithBundleIdentifier:@"com.spotify.client"];
-
-	doppler = [[PlayerApplication alloc] initWithBundleIdentifier:@"co.brushedtype.doppler-macos"];
 
 	// Force MacOS to ask for authorization to AppleEvents if this was not already given
 	if([iTunes isRunning])
@@ -807,6 +811,8 @@ static NSTimeInterval updateSystemVolumeInterval=0.1f;
 		accessibilityDialog = [[AccessibilityDialog alloc] initWithWindowNibName:@"AccessibilityDialog"];
 		[accessibilityDialog showWindow:self];
 	}
+    
+    [TahoeVolumeHUD sharedManager].delegate = self;
 }
 
 - (BOOL)applicationShouldHandleReopen:(NSApplication *)sender hasVisibleWindows:(BOOL)flag
@@ -892,13 +898,7 @@ static NSTimeInterval updateSystemVolumeInterval=0.1f;
 	[self setLockSystemAndPlayerVolume:[preferences boolForKey:  @"LockSystemAndPlayerVolume"]];
 	[self setAutomaticUpdates:[preferences boolForKey:     @"AutomaticUpdates"]];
 	[self setHideFromStatusBar:[preferences boolForKey:    @"hideFromStatusBarPreference"]];
-    if (@available(macOS 16.0, *)) {
+    [self setHideVolumeWindow:[preferences boolForKey:     @"hideVolumeWindowPreference"]];
-        // Running on Tahoe (2026) or newer
-        NSMenuItem *item = [self.statusMenu itemWithTag:HIDE_VOLUME_WINDOW_ID];
-        [item setHidden:YES];
-    } else {
-        [self setHideVolumeWindow:[preferences boolForKey:     @"hideVolumeWindowPreference"]];
-    }
 	[[self iTunesBtn] setState:[preferences boolForKey:    @"iTunesControl"]];
 	if (@available(macOS 10.15, *)) {
 		[[self iTunesBtn] setTitle:@"Music"];
@@ -1172,7 +1172,7 @@ static NSTimeInterval updateSystemVolumeInterval=0.1f;
         NSInteger numQrtsBlks = 0;
         
         if (@available(macOS 16.0, *)) {
-            // Running on Tahoe (2026) or newer
+            // On Tahoe, show the new popover HUD anchored to the status item.
         } else {
             image = (volume > 0)? OSDGraphicSpeaker : OSDGraphicSpeakerMute;
             numFullBlks = floor(volume/6.25);
@@ -1181,10 +1181,11 @@ static NSTimeInterval updateSystemVolumeInterval=0.1f;
 
 		//NSLog(@"%d %d",(int)numFullBlks,(int)numQrtsBlks);
 
-		if(!_hideVolumeWindow)
+        if(!_hideVolumeWindow)
         {
             if (@available(macOS 16.0, *)) {
-                // Running on Tahoe (2026) or newer
+                // On Tahoe, show the new popover HUD anchored to the status item.
+                [[TahoeVolumeHUD sharedManager] showHUDWithVolume:volume usingMusicPlayer:runningPlayerPtr andLabel:[systemAudio getDefaultOutputDeviceName] anchoredToStatusButton:self.statusBar.button];
             } else {
                 if(image) {
                     id osdMgr = [self->OSDManager sharedManager];
@@ -1526,6 +1527,48 @@ static NSTimeInterval updateSystemVolumeInterval=0.1f;
 	}
 }
 
+#pragma mark - TahoeVolumeHUDDelegate
+
+- (void)hud:(TahoeVolumeHUD *)hud didChangeVolume:(double)volume forPlayer:(PlayerApplication*)controlledPlayer{
+    // This method is called every time the user drags the slider in the HUD.
+    // The received 'volume' is a value between 0.0 and 1.0.
+
+    // 1. Convert the 0.0-1.0 scale to the 0-100 scale our app uses.
+    double volumePercent = volume * 100.0;
+
+    // 2. Get the currently active player, just like we do for the volume keys.
+    id runningPlayerPtr = controlledPlayer;
+    
+    if (runningPlayerPtr != nil) {
+        // 3. Set the volume for the active player.
+        [runningPlayerPtr setCurrentVolume:volumePercent];
+        
+        // 4. If volume is locked, also set the system volume.
+        if (_LockSystemAndPlayerVolume && runningPlayerPtr != systemAudio) {
+            [systemAudio setCurrentVolume:volumePercent];
+        }
+
+        // 5. Update the percentage labels in the status menu to reflect the change in real-time.
+        if (runningPlayerPtr == iTunes) {
+            [self setItunesVolume:volumePercent];
+        } else if (runningPlayerPtr == spotify) {
+            [self setSpotifyVolume:volumePercent];
+        } else if (runningPlayerPtr == doppler) {
+            [self setDopplerVolume:volumePercent];
+        }
+
+        if (_LockSystemAndPlayerVolume || runningPlayerPtr == systemAudio) {
+            [self setSystemVolume:volumePercent];
+        }
+    }
+}
+
+- (void)didChangeVolumeFinal:(TahoeVolumeHUD *)hud {
+    // This is called when the HUD fades out. We can play the feedback sound here
+    [self emitAcousticFeedback];
+}
+
+
 #pragma mark - Sparkle Delegates
 
 // This is the Objective-C equivalent of the Swift property 'supportsGentleScheduledUpdateReminders'

Sources/Controllers/ISSoundAdditions.h

@@ -1,73 +0,0 @@
-//
-//  ISSoundAdditions.m (ver 1.2 - 2012.10.27)
-//
-//	Created by Massimo Moiso (2012-09) InerziaSoft
-//	based on an idea of Antonio Nunes, SintraWorks
-//
-// Permission is granted free of charge to use this code without restriction
-// and without limitation, with the only condition that the copyright
-// notice and this permission shall be included in all copies.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-// THE SOFTWARE.
-
-/*
- GOAL
- This is a category of NSSound build using CoreAudio to get and set the volume of the
- system sound and some other utility.
- It was implemented using the Apple documentation and various unattributed code fragments
- found on the net. For this reason, its use is free for all.
- 
- USE
- To maintain the Cocoa conventions, a property-like syntax was used; the following
- methods ("properties") are available:
- 
-	(float)systemVolume			- return the volume of the default sound device
-	setSystemVolume(float)			- set the volume of the default sound device
-	(AudioDeviceID)defaultOutputDevice	- return the default output device
-	applyMute(boolean)			- enable or disable muting, if supported
- 
- REQUIREMENTS
- At least MacOS X 10.6
- Core Audio Framework
- */
-
-#import <Cocoa/Cocoa.h>
-#import <CoreAudio/CoreAudio.h>
-#import <AudioToolbox/AudioServices.h>
-
-@interface NSSound (ISSoundAdditions)
-
-+ (AudioDeviceID)defaultOutputDevice;
-
-+ (float)systemVolume;
-+ (void)setSystemVolume:(float)inVolume;
-
-+ (void)increaseSystemVolumeBy:(float)amount;
-+ (void)decreaseSystemVolumeBy:(float)amount;
-
-+ (void)applyMute:(Boolean)m;
-+ (Boolean)isMuted;
-
-#define	ZERO_THRESHOLD	0.000			//if the volume should be set under this value, the device will be muted
-
-@end
-
-@interface SystemApplication : NSObject{
-    
-    NSAppleScript *ASSystemVolume;
-    NSAppleEventDescriptor* AEsetVolume;
-    NSAppleEventDescriptor* AEgetVolume;
-    
-}
-
-@property (assign, nonatomic) double currentVolume;  // The sound output volume (0 = minimum, 100 = maximum)
-@property (assign, nonatomic) double oldVolume;
-@property (assign, nonatomic) double doubleVolume;
-
-@end

Sources/Controllers/ISSoundAdditions.m

@@ -1,381 +0,0 @@
-//
-//  ISSoundAdditions.m (ver 1.2 - 2012.10.27)
-//
-//	Created by Massimo Moiso (2012-09) InerziaSoft
-//	based on an idea of Antonio Nunes, SintraWorks
-//
-// Permission is granted free of charge to use this code without restriction
-// and without limitation, with the only condition that the copyright
-// notice and this permission shall be included in all copies.
-// 
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-// THE SOFTWARE.
-
-
-#import <Carbon/Carbon.h>
-
-#import "ISSoundAdditions.h"
-
-AudioDeviceID obtainDefaultOutputDevice();
-
-@implementation NSSound (ISSoundAdditions)
-
-//
-//	Return the ID of the default audio device; this is a C routine
-//
-//	IN:		none
-//	OUT:	the ID of the default device or AudioObjectUnknown
-//
-AudioDeviceID obtainDefaultOutputDevice()
-{
-    AudioDeviceID theAnswer = kAudioObjectUnknown;
-    UInt32 theSize = sizeof(AudioDeviceID);
-    AudioObjectPropertyAddress theAddress;
-	
-	theAddress.mSelector = kAudioHardwarePropertyDefaultOutputDevice;
-	theAddress.mScope = kAudioObjectPropertyScopeGlobal;
-	theAddress.mElement = kAudioObjectPropertyElementMaster;
-	
-	//first be sure that a default device exists
-	if (! AudioObjectHasProperty(kAudioObjectSystemObject, &theAddress) )	{
-		NSLog(@"Unable to get default audio device");
-		return theAnswer;
-	}
-	//get the property 'default output device'
-    OSStatus theError = AudioObjectGetPropertyData(kAudioObjectSystemObject, &theAddress, 0, NULL, &theSize, &theAnswer);
-    if (theError != noErr) {
-		NSLog(@"Unable to get output audio device");
-		return theAnswer;
-	}
-    return theAnswer;
-}
-
-//
-//	Return the ID of the default audio device; this is a category class method
-//	that can be called from outside
-//
-//	IN:		none
-//	OUT:	the ID of the default device or AudioObjectUnknown
-//
-+ (AudioDeviceID)defaultOutputDevice
-{
-	return obtainDefaultOutputDevice();
-}
-
-
-//
-//	Return the system sound volume as a float in the range [0...1]
-//
-//	IN:		none
-//	OUT:	(float) the volume of the default device
-//
-+ (float)systemVolume
-{	
-	AudioDeviceID				defaultDevID = kAudioObjectUnknown;
-	UInt32						theSize = sizeof(Float32);
-	OSStatus					theError;
-	Float32						theVolume = 0;
-	AudioObjectPropertyAddress	theAddress;
-	
-	defaultDevID = obtainDefaultOutputDevice();
-	if (defaultDevID == kAudioObjectUnknown) return 0.0;		//device not found: return 0
-	
-	theAddress.mSelector = kAudioHardwareServiceDeviceProperty_VirtualMasterVolume;
-	theAddress.mScope = kAudioDevicePropertyScopeOutput;
-	theAddress.mElement = kAudioObjectPropertyElementMaster;
-	
-	//be sure that the default device has the volume property
-	if (! AudioObjectHasProperty(defaultDevID, &theAddress) ) {
-		NSLog(@"No volume control for device 0x%0x",defaultDevID);
-		return 0.0;
-	}
-	
-	//now read the property and correct it, if outside [0...1]
-	theError = AudioObjectGetPropertyData(defaultDevID, &theAddress, 0, NULL, &theSize, &theVolume);
-	if ( theError != noErr )	{
-		NSLog(@"Unable to read volume for device 0x%0x", defaultDevID);
-		return 0.0;
-	}
-	theVolume = theVolume > 1.0 ? 1.0 : (theVolume < 0.0 ? 0.0 : theVolume);
-	
-	return theVolume;
-}
-
-//
-//	Set the volume of the default device
-//
-//	IN:		(float)the new volume
-//	OUT:	none
-//
-+ (void)setSystemVolume:(float)theVolume
-{
-	float						newValue = theVolume;
-	AudioObjectPropertyAddress	theAddress;
-	AudioDeviceID				defaultDevID;
-	OSStatus					theError = noErr;
-	UInt32						muted;
-	Boolean						canSetVol = YES, muteValue;
-	Boolean						hasMute = YES, canMute = YES;
-	
-	defaultDevID = obtainDefaultOutputDevice();
-	if (defaultDevID == kAudioObjectUnknown) {			//device not found: return without trying to set
-		NSLog(@"Device unknown");
-		return;
-	}
-	
-    //check if the new value is in the correct range - normalize it if not
-	newValue = theVolume > 1.0 ? 1.0 : (theVolume <= THRESHOLD ? ZERO_THRESHOLD : theVolume);
-	if (newValue != theVolume) {
-		NSLog(@"Tentative volume (%5.2f) was out of range; reset to %5.2f", theVolume, newValue);
-	}
-    
-	theAddress.mElement = kAudioObjectPropertyElementMaster;
-	theAddress.mScope = kAudioDevicePropertyScopeOutput;
-	
-    //set the selector to mute or not by checking if under threshold and check if a mute command is available
-	if ( (muteValue = (newValue <= ZERO_THRESHOLD)) )
-	{
-		theAddress.mSelector = kAudioDevicePropertyMute;
-		hasMute = AudioObjectHasProperty(defaultDevID, &theAddress);
-		if (hasMute)
-		{
-			theError = AudioObjectIsPropertySettable(defaultDevID, &theAddress, &canMute);
-			if (theError != noErr || !canMute)
-			{
-				canMute = NO;
-				NSLog(@"Should mute device 0x%0x but did not success",defaultDevID);
-			}
-		}
-		else canMute = NO;
-	}
-	else
-	{
-		theAddress.mSelector = kAudioHardwareServiceDeviceProperty_VirtualMasterVolume;
-	}
-	
-    // **** now manage the volume following the what we found ****
-	
-    //be sure the device has a volume command
-	if (! AudioObjectHasProperty(defaultDevID, &theAddress))
-	{
-		NSLog(@"The device 0x%0x does not have a volume to set", defaultDevID);
-		return;
-	}
-	
-    //be sure the device can set the volume
-	theError = AudioObjectIsPropertySettable(defaultDevID, &theAddress, &canSetVol);
-	if ( theError!=noErr || !canSetVol )
-	{
-		NSLog(@"The volume of device 0x%0x cannot be set", defaultDevID);
-		return;
-	}
-	
-    //if under the threshold then mute it, only if possible - done/exit
-	if (muteValue && hasMute && canMute)
-	{
-		muted = 1;
-		theError = AudioObjectSetPropertyData(defaultDevID, &theAddress, 0, NULL, sizeof(muted), &muted);
-		if (theError != noErr)
-		{
-			NSLog(@"The device 0x%0x was not muted",defaultDevID);
-			return;
-		}
-	}
-	else		//else set it
-	{
-		theError = AudioObjectSetPropertyData(defaultDevID, &theAddress, 0, NULL, sizeof(newValue), &newValue);
-		if (theError != noErr)
-		{
-			NSLog(@"The device 0x%0x was unable to set volume", defaultDevID);
-		}
-        //if device is able to handle muting, maybe it was muted, so unlock it
-		if (hasMute && canMute)
-		{
-			theAddress.mSelector = kAudioDevicePropertyMute;
-			muted = 0;
-			theError = AudioObjectSetPropertyData(defaultDevID, &theAddress, 0, NULL, sizeof(muted), &muted);
-		}
-	}
-	if (theError != noErr) {
-		NSLog(@"Unable to set volume for device 0x%0x", defaultDevID);
-	}
-}
-
-
-//
-//	Increase the volume of the system device by a certain value
-//
-//	IN:		(float) amount of volume to increase
-//	OUT:	none
-//
-+ (void)increaseSystemVolumeBy:(float)amount {
-    [self setSystemVolume:self.systemVolume+amount];
-}
-
-//
-//	Decrease the volume of the system device by a certain value
-//
-//	IN:		(float) amount of volume to decrease
-//	OUT:	none
-//
-+ (void)decreaseSystemVolumeBy:(float)amount {
-    [self setSystemVolume:self.systemVolume-amount];
-}
-
-//
-//	IN:		(Boolean) if true the device is muted, false it is unmated
-//	OUT:		none
-//
-+ (void)applyMute:(Boolean)m
-{
-	AudioDeviceID				defaultDevID = kAudioObjectUnknown;
-	AudioObjectPropertyAddress	theAddress;
-	Boolean						hasMute, canMute = YES;
-	OSStatus					theError = noErr;
-	UInt32						muted = 0;
-	
-	defaultDevID = obtainDefaultOutputDevice();
-	if (defaultDevID == kAudioObjectUnknown) {			//device not found
-		NSLog(@"Device unknown");
-		return;
-	}
-	
-	theAddress.mElement = kAudioObjectPropertyElementMaster;
-	theAddress.mScope = kAudioDevicePropertyScopeOutput;
-	theAddress.mSelector = kAudioDevicePropertyMute;
-	muted = m ? 1 : 0;
-	
-	hasMute = AudioObjectHasProperty(defaultDevID, &theAddress);
-	
-	if (hasMute)
-	{
-		theError = AudioObjectIsPropertySettable(defaultDevID, &theAddress, &canMute);
-		if (theError == noErr && canMute)
-		{
-			theError = AudioObjectSetPropertyData(defaultDevID, &theAddress, 0, NULL, sizeof(muted), &muted);
-			if (theError != noErr) NSLog(@"Cannot change mute status of device 0x%0x", defaultDevID);
-		}
-	}
-}
-
-+ (Boolean)isMuted
-{
-    AudioDeviceID				defaultDevID = kAudioObjectUnknown;
-    AudioObjectPropertyAddress	theAddress;
-    Boolean						hasMute, canMute = YES;
-    OSStatus					theError = noErr;
-    UInt32						muted = 0;
-    UInt32                      mutedSize = 4;
-    
-    defaultDevID = obtainDefaultOutputDevice();
-    if (defaultDevID == kAudioObjectUnknown) {			//device not found
-        NSLog(@"Device unknown");
-        return false;           // works, but not the best return code for this
-    }
-    
-    theAddress.mElement = kAudioObjectPropertyElementMaster;
-    theAddress.mScope = kAudioDevicePropertyScopeOutput;
-    theAddress.mSelector = kAudioDevicePropertyMute;
-    
-    hasMute = AudioObjectHasProperty(defaultDevID, &theAddress);
-    
-    if (hasMute)
-    {
-        theError = AudioObjectIsPropertySettable(defaultDevID, &theAddress, &canMute);
-        if (theError == noErr && canMute)
-        {
-            theError = AudioObjectGetPropertyData(defaultDevID, &theAddress, 0, NULL, &mutedSize, &muted);
-            if (muted) {
-                return true;
-            }
-        }
-    }
-    return false;
-}
-
-@end
-
-@implementation SystemApplication
-
-@synthesize currentVolume = _currentVolume;
-@synthesize doubleVolume = _doubleVolume;
-
-- (void) setCurrentVolume:(double)currentVolume
-{
-    [self setDoubleVolume:currentVolume];
-    
-    NSAppleEventDescriptor* AEsetVolumeParams = [NSAppleEventDescriptor listDescriptor];
-    [AEsetVolumeParams insertDescriptor:[NSAppleEventDescriptor descriptorWithInt32:(int)currentVolume] atIndex:1];
-    [AEsetVolume setParamDescriptor:AEsetVolumeParams forKeyword:keyDirectObject];
-    
-    NSDictionary *error = nil;
-    [ASSystemVolume executeAppleEvent:AEsetVolume error:&error];
-    
-    // [NSSound setSystemVolume:currentVolume/100.];
-}
-
-- (double) currentVolume
-{
-    double vol = 0;
-    
-    NSAppleEventDescriptor* AEsetVolumeParams = [NSAppleEventDescriptor listDescriptor];
-    [AEsetVolume setParamDescriptor:AEsetVolumeParams forKeyword:keyDirectObject];
-    
-    NSDictionary *error = nil;
-    NSAppleEventDescriptor *resultEventDescriptor = [ASSystemVolume executeAppleEvent:AEgetVolume error:&error];
-    if (! resultEventDescriptor) {
-        NSLog(@"%s AppleScript getVolume error = %@", __PRETTY_FUNCTION__, error);
-    }
-    else {
-        if ([resultEventDescriptor descriptorType] == cLongInteger) {
-            vol = (double)[resultEventDescriptor int32Value];
-        }
-        else
-        {
-            NSLog(@"%s AppleScript getVolume error = Return argument has wrong type", __PRETTY_FUNCTION__);
-        }
-    }
-    
-    // double vol = (double)[NSSound systemVolume]*100;
-    
-    if (fabs(vol-[self doubleVolume])<1)
-    {
-        vol = [self doubleVolume];
-    }
-    
-    return vol;
-}
-
--(id)init {
-    if (self = [super init])  {
-        [self setOldVolume: -1];
-        
-        NSURL *URL = [[NSBundle mainBundle] URLForResource:@"SystemVolume" withExtension:@"scpt"];
-        if (URL) {
-            ASSystemVolume = [[NSAppleScript alloc] initWithContentsOfURL:URL error:NULL];
-            
-            // target
-            ProcessSerialNumber psn = {0, kCurrentProcess};
-            NSAppleEventDescriptor *target = [NSAppleEventDescriptor descriptorWithDescriptorType:typeProcessSerialNumber bytes:&psn length:sizeof(ProcessSerialNumber)];
-            
-            // functions
-            NSAppleEventDescriptor *setVolumeHandler = [NSAppleEventDescriptor descriptorWithString:@"setVolume"];
-            NSAppleEventDescriptor *getVolumeHandler = [NSAppleEventDescriptor descriptorWithString:@"getVolume"];
-            
-            // events
-            AEsetVolume = [NSAppleEventDescriptor appleEventWithEventClass:kASAppleScriptSuite eventID:kASSubroutineEvent targetDescriptor:target returnID:kAutoGenerateReturnID transactionID:kAnyTransactionID];
-            [AEsetVolume setParamDescriptor:setVolumeHandler forKeyword:keyASSubroutineName];
-            
-            AEgetVolume = [NSAppleEventDescriptor appleEventWithEventClass:kASAppleScriptSuite eventID:kASSubroutineEvent targetDescriptor:target returnID:kAutoGenerateReturnID transactionID:kAnyTransactionID];
-            [AEgetVolume setParamDescriptor:getVolumeHandler forKeyword:keyASSubroutineName];
-        }
-    }
-    return self;
-}
-
-@end

Sources/Controllers/IntroWindowController.h

@@ -1,42 +0,0 @@
-//
-//  IntroWindowController.h
-//  iTunes Volume Control
-//
-//  Created by Andrea Alberti on 15.12.13.
-//  Copyright (c) 2013 Andrea Alberti. All rights reserved.
-//
-
-#import <Cocoa/Cocoa.h>
-
-@class AppDelegate;
-
-@interface IntroWindowController : NSWindowController
-{
-    AppDelegate *appDelegate;
-    
-    CALayer* iTunesScreenshotIntroLayer;
-    CALayer* statusbarScreenshotIntroLayer;
-    CALayer* arrow_1_Layer;
-    CALayer* arrow_2_Layer;
-
-    IBOutlet NSTextField *iTune_label_1;
-    IBOutlet NSTextField *iTune_label_2;
-    IBOutlet NSTextField *iTune_label_3;
-    
-    int step_number;
-    
-@public
-}
-
-@property (nonatomic,assign) IBOutlet NSButton *closeButton;
-@property (nonatomic,assign) IBOutlet NSButton *nextButton;
-@property (nonatomic,assign) IBOutlet NSButton *previousButton;
-@property (nonatomic,assign) IBOutlet NSButton *loadIntroAtStartButton;
-
-- (IBAction)nextButtonClicked:(id)sender;
-- (IBAction)prevButtonClicked:(id)sender;
-- (IBAction)closeButtonClicked:(id)sender;
-- (IBAction)loadIntroAtStartChanged:(id)sender;
-
-
-@end

Sources/Controllers/IntroWindowController.m

@@ -1,249 +0,0 @@
-//
-//  IntroWindowController.m
-//  iTunes Volume Control
-//
-//  Created by Andrea Alberti on 15.12.13.
-//  Copyright (c) 2013 Andrea Alberti. All rights reserved.
-//
-
-#import "IntroWindowController.h"
-#import <QuartzCore/CoreAnimation.h>
-#import "AppDelegate.h"
-
-@interface IntroWindowController ()
-
-@end
-
-@implementation IntroWindowController
-
-@synthesize nextButton;
-@synthesize previousButton;
-@synthesize closeButton;
-@synthesize loadIntroAtStartButton;
-
-- (id)initWithWindow:(NSWindow *)window
-{
-    self = [super initWithWindow:window];
-    if (self) {
-        // Initialization code here.
-        
-        appDelegate = [[NSApplication sharedApplication] delegate];
-        
-        [[NSNotificationCenter defaultCenter] addObserver:appDelegate selector:@selector(introWindowWillClose:) name:NSWindowWillCloseNotification object:window];
-        
-        step_number = 0;
-    }
-    return self;
-}
-
-
-- (IBAction)loadIntroAtStartChanged:(id)sender
-{
-    [appDelegate setLoadIntroAtStart:[loadIntroAtStartButton state]];
-}
-
-- (IBAction)closeButtonClicked:(id)sender
-{
-    [NSTimer scheduledTimerWithTimeInterval:0.2 target:[self window] selector:@selector(close) userInfo:nil repeats:NO];
-}
-
-- (IBAction)nextButtonClicked:(id)sender
-{
-    //    CABasicAnimation* fadeOutAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];
-    //    [fadeOutAnimation setDuration:1.f];
-    //    [fadeOutAnimation setRemovedOnCompletion:NO];
-    //    [fadeOutAnimation setFillMode:kCAFillModeForwards];
-    //    [fadeOutAnimation setFromValue:[NSNumber numberWithFloat:1.0f]];
-    //    [fadeOutAnimation setToValue:[NSNumber numberWithFloat:0.0f]];
-    
-    switch (step_number)
-    {
-        case 0:
-            
-            [previousButton setEnabled:YES];
-            
-            [[NSAnimationContext currentContext] setDuration:1.0f];
-            [NSAnimationContext beginGrouping];
-            //    [introLayer addAnimation:fadeOutAnimation forKey:@"decreaseOpacity"];
-            [[iTune_label_2 animator] setAlphaValue:1.f];
-            [arrow_2_Layer setOpacity:1.f];
-            [NSAnimationContext endGrouping];
-            break;
-        case 1:
-            [nextButton setEnabled:NO];
-            [closeButton setEnabled:YES];
-            
-            [[NSAnimationContext currentContext] setDuration:0.8f];
-            [NSAnimationContext beginGrouping];
-            [[iTune_label_1 animator] setAlphaValue:0.f];
-            [[iTune_label_2 animator] setAlphaValue:0.f];
-            [arrow_1_Layer setOpacity:0.f];
-            [arrow_2_Layer setOpacity:0.f];
-            [statusbarScreenshotIntroLayer setOpacity:1.0f];
-            [iTunesScreenshotIntroLayer setOpacity:0.0f];
-            [NSAnimationContext endGrouping];
-
-            
-            break;
-    }
-    
-    step_number++;
-    
-}
-
-- (IBAction)prevButtonClicked:(id)sender
-{
-    switch (step_number)
-    {
-        case 1:
-            [previousButton setEnabled:NO];
-            
-            [[NSAnimationContext currentContext] setDuration:0.4f];
-            [NSAnimationContext beginGrouping];
-            //    [introLayer addAnimation:fadeOutAnimation forKey:@"decreaseOpacity"];
-            [[iTune_label_2 animator] setAlphaValue:0.f];
-            [arrow_2_Layer setOpacity:0.f];
-            [NSAnimationContext endGrouping];
-            
-            
-            break;
-        case 2:
-            [nextButton setEnabled:YES];
-            [closeButton setEnabled:NO];
-            
-            [[NSAnimationContext currentContext] setDuration:0.4f];
-            [NSAnimationContext beginGrouping];
-            [[iTune_label_1 animator] setAlphaValue:1.f];
-            [[iTune_label_2 animator] setAlphaValue:1.f];
-            [arrow_1_Layer setOpacity:1.f];
-            [arrow_2_Layer setOpacity:1.f];
-            [statusbarScreenshotIntroLayer setOpacity:0.0f];
-            [iTunesScreenshotIntroLayer setOpacity:1.0f];
-            [NSAnimationContext endGrouping];
-            break;
-    }
-    
-    step_number--;
-}
-
-
--(void)showFirstMessage:(NSTimer*)theTimer
-{
-    [[NSAnimationContext currentContext] setDuration:1.3f];
-    [NSAnimationContext beginGrouping];
-    [[iTune_label_1 animator] setAlphaValue:1.f];
-    [arrow_1_Layer setOpacity:1.f];
-    [NSAnimationContext endGrouping];
-}
-
--(void)awakeFromNib
-{
-    NSWindow* introWindow = [self window];
-    NSView* introContentView = [introWindow contentView];
-    
-    CGSize windowViewSize = [introContentView frame].size;
-    
-    NSRect imageRect = NSZeroRect;
-    
-    NSImage *iTunesScreenshot=[NSImage imageNamed:@"iTunes-screenshot"];
-    NSImage *iTunes_arrow_1=[NSImage imageNamed:@"iTunes-arrow-1"];
-    NSImage *iTunes_arrow_2=[NSImage imageNamed:@"iTunes-arrow-2"];
-//    NSImage *statusbarScreenshot=[NSImage imageNamed:@"statusbar-screenshot"];
-    NSImage *statusbarScreenshot=[NSImage imageNamed:@"keyboard"];
-    
-    //[introWindow setContentBorderThickness:36 forEdge:NSMinYEdge];
-    
-    CALayer* toplayer = [CALayer layer];
-    //CGColorRef backgroundColor=CGColorCreateGenericRGB(1.f, 1.f, 1.f, 1.f);
-    //[toplayer setBackgroundColor:backgroundColor];
-    //CFRelease(backgroundColor);
-    
-    // iTunes screenshot
-    iTunesScreenshotIntroLayer = [CALayer layer];
-    imageRect.size = [iTunesScreenshot size];
-    [iTunesScreenshotIntroLayer setFrame:NSRectToCGRect(imageRect)];
-    [iTunesScreenshotIntroLayer setPosition:CGPointMake(windowViewSize.width/2-16,windowViewSize.height-imageRect.size.height/2-60)];
-    [iTunesScreenshotIntroLayer setContents:iTunesScreenshot];
-    //[introLayer setBorderColor:CGColorCreateGenericRGB(1.f, 0.f, 0.f, 1.f)];
-    //[introLayer setBorderWidth:1];
-    [toplayer addSublayer:iTunesScreenshotIntroLayer];
-    
-    // Statusbar screenshot
-    statusbarScreenshotIntroLayer = [CALayer layer];
-    //  [statusbarScreenshotIntroLayer setCompositingFilter:[CIFilter filterWithName:@"CIAdditionCompositing"]];
-
-    imageRect.size = [statusbarScreenshot size];
-    [statusbarScreenshotIntroLayer setFrame:NSRectToCGRect(imageRect)];
-    [statusbarScreenshotIntroLayer setPosition:CGPointMake(350,windowViewSize.height-250)];
-    [statusbarScreenshotIntroLayer setContents:statusbarScreenshot];
-    [statusbarScreenshotIntroLayer setOpacity:0.f];
-    [toplayer addSublayer:statusbarScreenshotIntroLayer];
-    
-    arrow_1_Layer = [CALayer layer];
-    imageRect.size = [iTunes_arrow_1 size];
-    [arrow_1_Layer setFrame:NSRectToCGRect(imageRect)];
-    [arrow_1_Layer setPosition:CGPointMake(313,windowViewSize.height-94)];
-    [arrow_1_Layer setContents:iTunes_arrow_1];
-    [arrow_1_Layer setOpacity:0.f];
-    [toplayer addSublayer:arrow_1_Layer];
-    
-    [iTune_label_1 setAlphaValue:0.f];
-    
-    arrow_2_Layer = [CALayer layer];
-    imageRect.size = [iTunes_arrow_2 size];
-    [arrow_2_Layer setFrame:NSRectToCGRect(imageRect)];
-    [arrow_2_Layer setPosition:CGPointMake(240,windowViewSize.height-95)];
-    [arrow_2_Layer setContents:iTunes_arrow_2];
-    [arrow_2_Layer setOpacity:0.f];
-    [toplayer addSublayer:arrow_2_Layer];
-    
-    [iTune_label_2 setAlphaValue:0.f];
-    
-    NSRect frameRect = NSMakeRect(20,20,40,40); // This will change based on the size you need
-    iTune_label_3 = [[NSTextField alloc] initWithFrame:frameRect];
-    [iTune_label_3 setStringValue:@"My Label"];
-    [iTune_label_3 setBezeled:NO];
-    [iTune_label_3 setDrawsBackground:NO];
-    [iTune_label_3 setEditable:NO];
-    [iTune_label_3 setSelectable:NO];
-    [introContentView addSubview:iTune_label_3];
-    
-    [introContentView setLayer:toplayer];
-    [introContentView setWantsLayer:YES];
-    
-    NSImage *closeButtonImage=[NSImage imageNamed:@"introButtons-close"];
-    NSImage *closeButtonImageHL=[NSImage imageNamed:@"introButtons-close-HL"];
-    [closeButton setImage: closeButtonImage];
-    [closeButton setAlternateImage: closeButtonImageHL];
-    [closeButton setBordered:NO];
-    [closeButton setEnabled:NO];
-    [[closeButton cell] setHighlightsBy:1];
-    
-    NSImage *nextButtonImage=[NSImage imageNamed:@"introButtons-next"];
-    NSImage *nextButtonImageHL=[NSImage imageNamed:@"introButtons-next-HL"];
-    [nextButton setImage: nextButtonImage];
-    [nextButton setAlternateImage: nextButtonImageHL];
-    [nextButton setBordered:NO];
-    [[nextButton cell] setHighlightsBy:1];
-    
-    NSImage *prevButtonImage=[NSImage imageNamed:@"introButtons-prev"];
-    NSImage *prevButtonImageHL=[NSImage imageNamed:@"introButtons-prev-HL"];
-    [previousButton setImage: prevButtonImage];
-    [previousButton setAlternateImage: prevButtonImageHL];
-    [previousButton setBordered:NO];
-    [previousButton setEnabled:NO];
-    [[previousButton cell] setHighlightsBy:1];
-    
-    [NSTimer scheduledTimerWithTimeInterval:0.3 target:self selector:@selector(showFirstMessage:) userInfo:nil repeats:NO];
-
-    [loadIntroAtStartButton setState: [appDelegate loadIntroAtStart]];
-}
-
-- (void)windowDidLoad
-{
-    [super windowDidLoad];
-    
-    // Implement this method to handle any initialization after your window controller's window has been loaded from its nib file.
-}
-
-@end

Sources/Controllers/SystemVolume.h

@@ -18,8 +18,10 @@
 
 -(id)init;
 -(bool)isMuted;
+-(NSString *)getDefaultOutputDeviceName;
     
 @property (assign, nonatomic) double currentVolume;  // The sound output volume (0 = minimum, 100 = maximum)
 @property (assign, nonatomic) double oldVolume;
+@property (assign, nonatomic) NSImage* icon;
 
 @end

Sources/Controllers/SystemVolume.m

@@ -14,6 +14,7 @@
 @implementation SystemApplication
 
 @synthesize currentVolume = _currentVolume;
+@synthesize icon = _icon;
 
 -(AudioDeviceID) getDefaultOutputDevice
 {
@@ -156,6 +157,40 @@
 	return ((double)volume) * 100.0;
 }
 
+- (NSString *)getDefaultOutputDeviceName
+{
+    AudioDeviceID defaultOutputDeviceID = [self getDefaultOutputDevice];
+    
+    if (defaultOutputDeviceID == kAudioObjectUnknown) {
+        return @"Unknown Device";
+    }
+    
+    CFStringRef deviceName = NULL;
+    UInt32 dataSize = sizeof(deviceName);
+    
+    AudioObjectPropertyAddress propertyAddress = {
+        kAudioObjectPropertyName,
+        kAudioObjectPropertyScopeGlobal,
+        kAudioObjectPropertyElementMain
+    };
+    
+    OSStatus result = AudioObjectGetPropertyData(defaultOutputDeviceID,
+                                                 &propertyAddress,
+                                                 0,
+                                                 NULL,
+                                                 &dataSize,
+                                                 &deviceName);
+    
+    if (result != kAudioHardwareNoError || deviceName == NULL) {
+        NSLog(@"Could not get device name for device 0x%0x", defaultOutputDeviceID);
+        return @"Unknown Device";
+    }
+    
+    NSString *name = [NSString stringWithString:(__bridge NSString *)deviceName];
+    CFRelease(deviceName);
+    return name;
+}
+
 
 -(void)dealloc
 {
@@ -164,6 +199,11 @@
 -(id)init{
 	if (self = [super init])  {
 		[self setOldVolume:[self currentVolume]];
+        if (@available(macOS 16.0, *)) {
+            [self setIcon:[NSImage imageNamed:@"FinderTahoe"]];
+        } else {
+            [self setIcon:[NSImage imageNamed:@"FinderSequoia"]];
+        }
 	}
 	return self;
 }

User interface/Accessability/AccessibilityDialog.xib

@@ -1,7 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="24127" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" customObjectInstantitationMethod="direct">
+<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="24128" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" customObjectInstantitationMethod="direct">
     <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="24127"/>
+        <deployment identifier="macosx"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="24128"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <objects>
@@ -19,7 +20,7 @@
         <window title="Authorization required" allowsToolTipsWhenApplicationIsInactive="NO" autorecalculatesKeyViewLoop="NO" releasedWhenClosed="NO" animationBehavior="default" id="F0z-JX-Cv5">
             <windowStyleMask key="styleMask" titled="YES" closable="YES" miniaturizable="YES" resizable="YES"/>
             <rect key="contentRect" x="1003" y="186" width="771" height="635"/>
-            <rect key="screenRect" x="0.0" y="0.0" width="2560" height="1415"/>
+            <rect key="screenRect" x="0.0" y="0.0" width="3072" height="1697"/>
             <view key="contentView" id="se5-gp-TjO">
                 <rect key="frame" x="0.0" y="0.0" width="771" height="635"/>
                 <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>

User interface/HUD/HUDPanel.h

@@ -0,0 +1,6 @@
+// FILE: HUDPanel.h
+
+#import <Cocoa/Cocoa.h>
+
+@interface HUDPanel : NSPanel
+@end

User interface/HUD/HUDPanel.m

@@ -0,0 +1,19 @@
+// FILE: HUDPanel.m
+#import "HUDPanel.h"
+
+@implementation HUDPanel
+
+// Allow this nonactivating panel to be key so controls (slider) behave nicely.
+- (BOOL)canBecomeKeyWindow { return YES; }
+
+// Explicitly state that the panel can become the first responder.
+// This allows controls within the panel (like the slider) to receive and process mouse events.
+- (BOOL)acceptsFirstResponder { return YES; }
+
+// Do not pretend to be the main app window.
+- (BOOL)canBecomeMainWindow { return NO; }
+
+// Keep it nonactivating: clicks won’t steal app focus.
+- (BOOL)worksWhenModal { return YES; }
+
+@end

User interface/HUD/LiquidGlassView.swift

@@ -0,0 +1,374 @@
+//
+//  LiquidGlassView.swift
+//
+//  Created by Andrea Alberti on 25.10.25.
+//
+//  A native glass host view (macOS 26+) with graceful fallback,
+//  usable from Objective-C and SwiftUI.
+//
+
+import AppKit
+import QuartzCore
+import SwiftUI
+
+@objc(LiquidGlassView)
+public final class LiquidGlassView: NSView {
+
+    // MARK: - Public API (Objective-C visible)
+
+    /// Where your content goes. Replaces any previous content.
+    @objc public var contentView: NSView? {
+        get { contentHost.subviews.first }
+        set {
+            contentHost.subviews.forEach { $0.removeFromSuperview() }
+            guard let v = newValue else { return }
+            v.translatesAutoresizingMaskIntoConstraints = false
+            contentHost.addSubview(v)
+            NSLayoutConstraint.activate([
+                v.leadingAnchor.constraint(equalTo: contentHost.leadingAnchor),
+                v.trailingAnchor.constraint(equalTo: contentHost.trailingAnchor),
+                v.topAnchor.constraint(equalTo: contentHost.topAnchor),
+                v.bottomAnchor.constraint(equalTo: contentHost.bottomAnchor)
+            ])
+        }
+    }
+
+    /// Corner radius applied to the glass.
+    @objc public var cornerRadius: CGFloat = 14 {
+        didSet {
+            applyCornerRadius()
+            updateRimPath() // Update rim to match new radius
+        }
+    }
+
+    /// Tint color for the glass (native on 26+, fallback paints a faint layer color).
+    @objc public var tintColor: NSColor? {
+        didSet { applyTint() }
+    }
+
+    /// NSGlassEffectView.Style (0 = Regular, 1 = Clear). Ignored on fallback.
+    @objc public var style: Int = 1 { // default Clear
+        didSet { applyStyle() }
+    }
+
+    /// Draws a vibrant, glowing white rim around the view.
+    @objc public var hasVibrantRim: Bool = false {
+        didSet {
+            updateRim()
+        }
+    }
+    
+    /// Convenience builder
+    @objc public class func glass(withStyle style: Int, cornerRadius: CGFloat, tintColor: NSColor?) -> LiquidGlassView {
+        let v = LiquidGlassView(frame: .zero)
+        v.translatesAutoresizingMaskIntoConstraints = false
+        v.style = style
+        v.cornerRadius = cornerRadius
+        v.tintColor = tintColor
+        return v
+    }
+
+    // MARK: Optional private Tahoe knobs (no-ops if unavailable)
+
+    /// 0..N variants
+    @objc public func setVariantIfAvailable(_ variant: Int) {
+        setPrivate("_variant", value: variant)
+    }
+
+    /// 0/1
+    @objc public func setScrimStateIfAvailable(_ state: Int) {
+        setPrivate("_scrimState", value: state)
+    }
+
+    /// 0/1
+    @objc public func setSubduedStateIfAvailable(_ state: Int) {
+        setPrivate("_subduedState", value: state)
+    }
+
+    /// Controls whether the glass adapts its appearance to light/dark mode.
+    /// Set to 0 to force a consistent (darker) look.
+    @objc public func setAdaptiveAppearanceIfAvailable(_ state: Int) {
+        setPrivate("_adaptiveAppearance", value: state)
+    }
+    
+    /// Accepts a boolean (YES/NO from ObjC) to use a smaller, sharper shadow rim.
+    @objc public func setUseReducedShadowRadiusIfAvailable(_ state: Bool) {
+        setPrivate("_useReducedShadowRadius", value: state)
+    }
+    
+    /// Controls a depth-of-field/focus simulation. Usually set to 0 to disable.
+    @objc public func setContentLensingIfAvailable(_ state: Int) {
+        setPrivate("_contentLensing", value: state)
+    }
+
+    /// SwiftUI-like post-processing (applies CIFilters to the layer).
+    /// Use sparingly; native glass already blurs/tints appropriately.
+    @objc public func applyVisualAdjustments(saturation: CGFloat = 1.0,
+                                             brightness: CGFloat = 0.0,
+                                             blur: CGFloat = 0.0) {
+        ensureLayerBacked()
+        var filters: [CIFilter] = []
+
+        if blur > 0 {
+            if let f = CIFilter(name: "CIGaussianBlur") {
+                f.setValue(blur, forKey: kCIInputRadiusKey)
+                filters.append(f)
+            }
+        }
+
+        if brightness != 0 || saturation != 1.0 {
+            if let f = CIFilter(name: "CIColorControls") {
+                f.setValue(saturation, forKey: "inputSaturation")
+                f.setValue(brightness,  forKey: "inputBrightness")
+                filters.append(f)
+            }
+        }
+
+        backingGlass.layer?.filters = filters.isEmpty ? nil : filters
+    }
+
+    // MARK: - Internals
+
+    private let contentHost = NSView(frame: .zero)
+    private var backingGlass: NSView!
+    private var rimLayer: CAShapeLayer?
+
+    public override init(frame frameRect: NSRect) {
+        super.init(frame: frameRect)
+        // The root view must be layer-backed to host the rim layer.
+        wantsLayer = true
+        buildBacking()
+        updateRim()
+    }
+
+    public required init?(coder: NSCoder) {
+        super.init(coder: coder)
+        // The root view must be layer-backed to host the rim layer.
+        wantsLayer = true
+        buildBacking()
+        updateRim()
+    }
+
+    public override func layout() {
+        super.layout()
+        // Update the rim's path whenever the view's size changes.
+        updateRimPath()
+    }
+    
+    public override func viewDidMoveToSuperview() {
+        super.viewDidMoveToSuperview()
+        guard let s = superview, translatesAutoresizingMaskIntoConstraints == false else { return }
+        NSLayoutConstraint.activate([
+            leadingAnchor.constraint(equalTo: s.leadingAnchor),
+            trailingAnchor.constraint(equalTo: s.trailingAnchor),
+            topAnchor.constraint(equalTo: s.topAnchor),
+            bottomAnchor.constraint(equalTo: s.bottomAnchor)
+        ])
+    }
+
+    // Build NSGlassEffectView if available, else NSVisualEffectView
+    private func buildBacking() {
+        let glass: NSView
+
+        if #available(macOS 26.0, *), let GlassType = NSClassFromString("NSGlassEffectView") as? NSView.Type {
+            let g = GlassType.init(frame: bounds)
+            g.translatesAutoresizingMaskIntoConstraints = false
+            glass = g
+        } else {
+            let v = NSVisualEffectView(frame: bounds)
+            v.translatesAutoresizingMaskIntoConstraints = false
+            v.material = .underWindowBackground
+            v.blendingMode = .behindWindow
+            v.state = .active
+            v.wantsLayer = true
+            v.layer?.masksToBounds = true
+            glass = v
+        }
+
+        backingGlass = glass
+
+        addSubview(backingGlass)
+        NSLayoutConstraint.activate([
+            backingGlass.leadingAnchor.constraint(equalTo: leadingAnchor),
+            backingGlass.trailingAnchor.constraint(equalTo: trailingAnchor),
+            backingGlass.topAnchor.constraint(equalTo: topAnchor),
+            backingGlass.bottomAnchor.constraint(equalTo: bottomAnchor)
+        ])
+
+        // content host
+        contentHost.translatesAutoresizingMaskIntoConstraints = false
+        contentHost.wantsLayer = false
+
+        if backingGlass.responds(to: NSSelectorFromString("setContentView:")) {
+            backingGlass.setValue(contentHost, forKey: "contentView") // NSGlassEffectView path
+        } else {
+            backingGlass.addSubview(contentHost) // fallback path
+            NSLayoutConstraint.activate([
+                contentHost.leadingAnchor.constraint(equalTo: backingGlass.leadingAnchor),
+                contentHost.trailingAnchor.constraint(equalTo: backingGlass.trailingAnchor),
+                contentHost.topAnchor.constraint(equalTo: backingGlass.topAnchor),
+                contentHost.bottomAnchor.constraint(equalTo: backingGlass.bottomAnchor)
+            ])
+        }
+
+        // Apply defaults
+        style = 1
+        cornerRadius = 14
+        tintColor = nil
+    }
+
+    private func applyStyle() {
+        if backingGlass.responds(to: NSSelectorFromString("setStyle:")) {
+            backingGlass.setValue(style, forKey: "style")
+        }
+    }
+
+    private func applyCornerRadius() {
+        if backingGlass.responds(to: NSSelectorFromString("setCornerRadius:")) {
+            backingGlass.setValue(cornerRadius, forKey: "cornerRadius")
+        } else {
+            ensureLayerBacked()
+            backingGlass.layer?.cornerRadius = cornerRadius
+            backingGlass.layer?.masksToBounds = true
+        }
+    }
+
+    private func applyTint() {
+        if backingGlass.responds(to: NSSelectorFromString("setTintColor:")) {
+            backingGlass.setValue(tintColor, forKey: "tintColor")
+        } else if let tint = tintColor {
+            ensureLayerBacked()
+            backingGlass.layer?.backgroundColor = tint.cgColor // very subtle on fallback
+        } else {
+            backingGlass.layer?.backgroundColor = nil
+        }
+    }
+
+    private func setPrivate(_ key: String, value: Any) {
+        guard backingGlass.responds(to: NSSelectorFromString("setContentView:")) else { return }
+        // Best-effort, swallow future changes safely
+        guard let glass = backingGlass else { return }
+        (try? ObjcKVC.setValue(value, forKey: key, on: glass)) ?? ()
+    }
+
+    private func ensureLayerBacked() {
+        if backingGlass.layer == nil {
+            backingGlass.wantsLayer = true
+            backingGlass.layer = CALayer()
+        }
+    }
+    
+    /// Creates, removes, or configures the rim layer based on the `hasVibrantRim` property.
+    private func updateRim() {
+        if hasVibrantRim {
+            guard rimLayer == nil else { return } // Already created
+
+            let newRim = CAShapeLayer()
+            
+            newRim.lineWidth = 1
+            newRim.strokeColor = NSColor(white: 1.0, alpha: 0.8).cgColor
+            newRim.fillColor = NSColor.clear.cgColor
+
+            // Configure the "vibrant" glow using the shadow property
+            newRim.shadowColor = NSColor.white.cgColor
+            newRim.shadowRadius = 1.0
+            newRim.shadowOpacity = 0.6
+            newRim.shadowOffset = .zero
+
+            self.layer?.addSublayer(newRim)
+            self.rimLayer = newRim
+            updateRimPath() // Set its initial path
+
+        } else {
+            // Remove the rim if it exists
+            rimLayer?.removeFromSuperlayer()
+            rimLayer = nil
+        }
+    }
+    
+    /// Recalculates the rim's path to match the view's current bounds and corner radius.
+    private func updateRimPath() {
+        if #available(macOS 26.0, *) {
+            guard let rimLayer = rimLayer else { return }
+            
+            // Inset the drawing rect by half the line width to keep the stroke centered on the edge
+            let insetRect = bounds.insetBy(dx: rimLayer.lineWidth / 2, dy: rimLayer.lineWidth / 2)
+            let path = NSBezierPath(roundedRect: insetRect, xRadius: cornerRadius, yRadius: cornerRadius)
+            rimLayer.path = path.cgPath
+        }
+    }
+}
+
+/// Tiny helper to avoid bridging crashes if KVC changes in future macOS versions
+private enum ObjcKVC {
+    static func setValue(_ value: Any, forKey key: String, on object: Any) throws {
+        (object as AnyObject).setValue(value, forKey: key)
+    }
+}
+
+// MARK: - SwiftUI wrapper
+
+public enum GUI { }
+
+@available(macOS 26.0, *)
+public struct CustomGlassEffectView<Content: View>: NSViewRepresentable {
+    private let variant: Int?
+    private let scrimState: Int?
+    private let subduedState: Int?
+    private let style: NSGlassEffectView.Style
+    private let tint: NSColor?
+    private let cornerRadius: CGFloat
+    private let hasVibrantRim: Bool
+    private let content: Content
+
+    public init(variant: Int? = nil,
+                scrimState: Int? = nil,
+                subduedState: Int? = nil,
+                style: NSGlassEffectView.Style = .clear,
+                tint: NSColor? = nil,
+                cornerRadius: CGFloat = 14,
+                hasVibrantRim: Bool = false,
+                @ViewBuilder content: () -> Content)
+    {
+        self.variant = variant
+        self.scrimState = scrimState
+        self.subduedState = subduedState
+        self.style = style
+        self.tint = tint
+        self.cornerRadius = cornerRadius
+        self.hasVibrantRim = hasVibrantRim
+        self.content = content()
+    }
+
+    public func makeNSView(context: Context) -> LiquidGlassView {
+        let v = LiquidGlassView.glass(withStyle: Int(style.rawValue),
+                                      cornerRadius: cornerRadius,
+                                      tintColor: tint)
+        v.hasVibrantRim = hasVibrantRim
+        
+        let hosting = NSHostingView(rootView: content)
+        hosting.translatesAutoresizingMaskIntoConstraints = false
+        v.contentView = hosting
+
+        if let variant { v.setVariantIfAvailable(variant) }
+        if let scrimState { v.setScrimStateIfAvailable(scrimState) }
+        if let subduedState { v.setSubduedStateIfAvailable(subduedState) }
+
+        return v
+    }
+
+    public func updateNSView(_ v: LiquidGlassView, context: Context) {
+        if let hosting = v.contentView as? NSHostingView<Content> {
+            hosting.rootView = content
+        }
+        v.style = Int(style.rawValue)
+        v.cornerRadius = cornerRadius
+        v.tintColor = tint
+        v.hasVibrantRim = hasVibrantRim
+        
+        if let variant { v.setVariantIfAvailable(variant) }
+        if let scrimState { v.setScrimStateIfAvailable(scrimState) }
+        if let subduedState { v.setSubduedStateIfAvailable(subduedState) }
+    }
+}
+

User interface/HUD/TahoeVolumeHUD.h

@@ -0,0 +1,43 @@
+//
+//  TahoeVolumeHUD.h
+//
+//  Created by Andrea Alberti on 25.10.25.
+//
+
+
+#import <Cocoa/Cocoa.h>
+
+// Do not import AppDelegate.h here to avoid circular imports.
+// Forward-declare the types we only need by pointer.
+@class TahoeVolumeHUD;
+@class PlayerApplication;
+
+NS_ASSUME_NONNULL_BEGIN
+
+@protocol TahoeVolumeHUDDelegate <NSObject>
+@optional
+/// Called whenever the user changes the slider (0.0–1.0).
+- (void)hud:(TahoeVolumeHUD *)hud didChangeVolume:(double)volume forPlayer:(PlayerApplication*)controlledPlayer;
+/// Called whenever the user changes the slider (0.0–1.0) for the last time releasing focus
+- (void)didChangeVolumeFinal:(TahoeVolumeHUD *)hud;
+
+@end
+
+/// A singleton, popover-like Tahoe glass HUD anchored to a status bar button.
+@interface TahoeVolumeHUD : NSObject
+
+@property (class, readonly, strong) TahoeVolumeHUD *sharedManager;
+@property (weak, nonatomic, nullable) id<TahoeVolumeHUDDelegate> delegate;
+
+/// Show/update the HUD under a status bar button. `volume` is 0.0–1.0 (or 0–100; both accepted).
+- (void)showHUDWithVolume:(double)volume usingMusicPlayer:(PlayerApplication*)controlledPlayer andLabel:(NSString*)label anchoredToStatusButton:(NSStatusBarButton *)button;
+
+/// Programmatically hide it immediately.
+- (void)hide;
+
+/// Optional: update the slider programmatically without showing/hiding.
+- (void)setVolume:(double)volume;
+
+@end
+
+NS_ASSUME_NONNULL_END

User interface/HUD/TahoeVolumeHUD.m

@@ -0,0 +1,439 @@
+// FILE: TahoeVolumeHUD.m
+
+#import "TahoeVolumeHUD.h"
+#import "VolumeSliderCell.h"
+#import <AppKit/NSGlassEffectView.h>
+#import "HUDPanel.h"
+#import "VolumeSlider.h"
+#import "AppDelegate.h"
+#import <QuartzCore/QuartzCore.h>
+
+// Product Module Name: Volume_Control
+#import "Volume_Control-Swift.h"  // exposes LiquidGlassView to ObjC
+
+// **IMPROVEMENT 1: Add VolumeSliderDelegate protocol conformance**
+@interface TahoeVolumeHUD () <VolumeSliderDelegate>
+
+// Window + layout
+@property (strong) HUDPanel *panel;
+@property (strong) NSView *root;
+@property (strong) LiquidGlassView *glass;
+
+// UI
+// **IMPROVEMENT 2: Change property type to be more specific**
+@property (strong) VolumeSlider *slider;
+@property (strong) NSImageView *appIconView;
+@property (strong) NSTimer *hideTimer;
+@property (strong) NSTextField *titleLabel;
+
+// Constraints
+@property (strong) NSLayoutConstraint *contentFixedHeight;
+
+// Player
+@property (strong) PlayerApplication *controlledPlayer;
+
+@end
+
+// Tunables
+static const CGFloat kHUDHeight      = 64.0;
+static const CGFloat kHUDWidth       = 290.0;
+static const CGFloat kCornerRadius   = 24.0;
+static const CGFloat kBelowGap       = 14.0;
+static const NSTimeInterval kAutoHide = 1.5;
+static const CGFloat kSideInset  = 12.0;  // left/right margin
+
+static const NSTimeInterval kFadeInDuration  = 0.25; // seconds
+static const NSTimeInterval kFadeOutDuration = 0.45; // seconds
+
+@implementation TahoeVolumeHUD
+
++ (TahoeVolumeHUD *)sharedManager {
+    static TahoeVolumeHUD *instance;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        instance = [[TahoeVolumeHUD alloc] initPrivate];
+    });
+    return instance;
+}
+
+- (instancetype)initPrivate {
+    self = [super init];
+    if (!self) return nil;
+
+    // ... (this part is correct) ...
+    // Panel
+    NSRect frame = NSMakeRect(0, 0, kHUDWidth, kHUDHeight);
+    _panel = [[HUDPanel alloc] initWithContentRect:frame
+                                         styleMask:(NSWindowStyleMaskBorderless | NSWindowStyleMaskNonactivatingPanel)
+                                           backing:NSBackingStoreBuffered
+                                             defer:NO];
+    _panel.opaque = NO;
+    _panel.backgroundColor = NSColor.clearColor;
+    _panel.hasShadow = NO;
+    _panel.appearance = [NSAppearance appearanceNamed:NSAppearanceNameVibrantDark];
+
+    // Set to NO to prevent the panel from hiding when the app is not active.
+    _panel.hidesOnDeactivate = NO;
+    
+    _panel.level = NSPopUpMenuWindowLevel;
+    _panel.movableByWindowBackground = NO;
+
+    // Ensure the panel can appear on any space.
+    // This makes it a true system-wide HUD.
+    _panel.collectionBehavior = NSWindowCollectionBehaviorTransient
+                              | NSWindowCollectionBehaviorFullScreenAuxiliary
+                              | NSWindowCollectionBehaviorCanJoinAllSpaces;
+
+    _panel.floatingPanel = YES;
+    _panel.becomesKeyOnlyIfNeeded = YES;
+
+    // Size fences
+    _panel.contentMinSize = NSMakeSize(kHUDWidth, kHUDHeight);
+    _panel.contentMaxSize = NSMakeSize(FLT_MAX, kHUDHeight);
+    [_panel setContentSize:NSMakeSize(kHUDWidth, kHUDHeight)];
+
+    // Root host
+    _root = [[NSView alloc] initWithFrame:_panel.contentView.bounds];
+    _root.translatesAutoresizingMaskIntoConstraints = NO;
+    _root.wantsLayer = YES;
+    _root.layer.backgroundColor = NSColor.clearColor.CGColor;
+    _panel.contentView = _root;
+
+    // Hard height on the window contentView — guarantees kHUDHeight regardless of fitting sizes
+    self.contentFixedHeight = [_panel.contentView.heightAnchor constraintEqualToConstant:kHUDHeight];
+    self.contentFixedHeight.priority = 1000;
+    self.contentFixedHeight.active = YES;
+
+    [NSLayoutConstraint activateConstraints:@[
+        [_root.leadingAnchor constraintEqualToAnchor:_panel.contentView.leadingAnchor],
+        [_root.trailingAnchor constraintEqualToAnchor:_panel.contentView.trailingAnchor],
+        [_root.topAnchor constraintEqualToAnchor:_panel.contentView.topAnchor],
+        [_root.bottomAnchor constraintEqualToAnchor:_panel.contentView.bottomAnchor],
+    ]];
+
+    // Glass (Swift class)
+    [self installGlassInto:_root cornerRadius:kCornerRadius];
+    
+    // Content wrapper (fills the glass)
+    NSView *wrapper = [NSView new];
+    wrapper.translatesAutoresizingMaskIntoConstraints = NO;
+    
+    // 1 of 3: Set the appearance for the entire content view.
+    // This forces all subviews (labels, icons) to use their dark variants.
+    wrapper.appearance = [NSAppearance appearanceNamed:NSAppearanceNameVibrantDark];
+    
+    // Build header row (icon + label) and slider strip
+    NSView *header = [self buildHeaderRow];
+    NSView *strip  = [self buildSliderStrip];
+    
+    [wrapper addSubview:header];
+    [wrapper addSubview:strip];
+    
+    // Anchor header to top, strip to bottom. This is more robust.
+    [NSLayoutConstraint activateConstraints:@[
+        [header.topAnchor constraintEqualToAnchor:wrapper.topAnchor],
+        [header.leadingAnchor constraintEqualToAnchor:wrapper.leadingAnchor],
+        [header.trailingAnchor constraintEqualToAnchor:wrapper.trailingAnchor],
+
+        [strip.bottomAnchor constraintEqualToAnchor:wrapper.bottomAnchor],
+        [strip.leadingAnchor constraintEqualToAnchor:wrapper.leadingAnchor],
+        [strip.trailingAnchor constraintEqualToAnchor:wrapper.trailingAnchor],
+    ]];
+
+    // Install in glass (wrapper stretches to the glass edges via LiquidGlassView)
+    self.glass.contentView = wrapper;
+
+
+    return self;
+}
+
+#pragma mark - Public API
+
+- (void)showHUDWithVolume:(double)volume usingMusicPlayer:(PlayerApplication*)player andLabel:(NSString*)label anchoredToStatusButton:(NSStatusBarButton *)button {
+    self.controlledPlayer = player;
+    
+    if (volume > 1.0) volume = MAX(0.0, MIN(1.0, volume / 100.0));
+    self.slider.doubleValue = volume;
+    
+    // Update header
+    self.appIconView.image = [player icon];
+    self.titleLabel.stringValue = label;
+    
+    // Size fence each time
+    [_panel setContentSize:NSMakeSize(kHUDWidth, kHUDHeight)];
+    
+    [self positionPanelBelowStatusButton:button];
+    
+    // Animate the fade-in
+    
+    // 1. If the panel is already visible, just update it.
+    // Otherwise, prepare for a fade-in animation.
+    if (!self.panel.isVisible) {
+        // Set the panel to be fully transparent before showing it
+        self.panel.alphaValue = 0.0;
+        [self.panel orderFront:nil];
+    }
+
+    // 2. Animate the alpha value to 1.0 (fully opaque)
+    [NSAnimationContext runAnimationGroup:^(NSAnimationContext * _Nonnull context) {
+        context.duration = kFadeInDuration;
+        context.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];
+        [[self.panel animator] setAlphaValue:1.0];
+    }];
+
+    // Reset the auto-hide timer
+    [self.hideTimer invalidate];
+    self.hideTimer = [NSTimer scheduledTimerWithTimeInterval:kAutoHide
+                                                      target:self
+                                                    selector:@selector(hide)
+                                                    userInfo:nil
+                                                     repeats:NO];
+}
+
+
+- (void)setVolume:(double)volume {
+    if (volume > 1.0) volume = MAX(0.0, MIN(1.0, volume / 100.0));
+    self.slider.doubleValue = volume;
+}
+
+- (void)hide {
+    // Invalidate the timer to prevent this method from being called again
+    [self.hideTimer invalidate];
+    self.hideTimer = nil;
+
+    // Animate the fade-out
+    
+    // 1. Animate the alpha value down to 0.0 (fully transparent)
+    [NSAnimationContext runAnimationGroup:^(NSAnimationContext * _Nonnull context) {
+        context.duration = kFadeOutDuration;
+        context.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];
+        [[self.panel animator] setAlphaValue:0.0];
+    } completionHandler:^{
+        // 2. AFTER the animation is complete, properly order the window out.
+        // This is crucial for performance and correctness.
+        [self.panel orderOut:nil];
+    }];
+}
+#pragma mark - Layout / Anchoring
+
+- (void)positionPanelBelowStatusButton:(NSStatusBarButton *)button {
+    if (!button || !button.window) {
+        NSScreen *screen = NSScreen.mainScreen ?: NSScreen.screens.firstObject;
+        if (screen) {
+            NSRect vis = screen.visibleFrame;
+            CGFloat x = NSMidX(vis) - self.panel.frame.size.width/2.0;
+            CGFloat y = NSMidY(vis) - self.panel.frame.size.height/2.0;
+            [self.panel setFrameOrigin:NSMakePoint(round(x), round(y))];
+        }
+        return;
+    }
+
+    NSRect buttonRectInWindow = [button convertRect:button.bounds toView:nil];
+    NSRect buttonInScreen = [button.window convertRectToScreen:buttonRectInWindow];
+
+    NSSize size = NSMakeSize(kHUDWidth, kHUDHeight);
+    CGFloat x = NSMidX(buttonInScreen) - size.width / 2.0;
+    CGFloat y = NSMinY(buttonInScreen) - size.height - kBelowGap;
+
+    NSScreen *target = button.window.screen ?: NSScreen.mainScreen;
+    NSRect vis = target.visibleFrame;
+
+    if (y < NSMinY(vis)) y = NSMinY(vis) + 2.0;
+
+    CGFloat margin = 8.0;
+    x = MAX(NSMinX(vis) + margin, MIN(x, NSMaxX(vis) - margin - size.width));
+
+    [self.panel setFrame:NSMakeRect(round(x), round(y), size.width, size.height) display:NO];
+}
+
+#pragma mark - Glass
+
+- (void)installGlassInto:(NSView *)host cornerRadius:(CGFloat)radius {
+    if (@available(macOS 26.0, *)) {
+        LiquidGlassView *glass = [LiquidGlassView glassWithStyle:NSGlassEffectViewStyleClear  // Clear
+                                                    cornerRadius:radius
+                                                       tintColor:[NSColor colorWithCalibratedWhite:0 alpha:1]];
+        self.glass = glass;
+        
+        // Enable the new vibrant rim here.
+        glass.hasVibrantRim = NO;
+        
+        [host addSubview:glass];
+        glass.translatesAutoresizingMaskIntoConstraints = NO;
+        [NSLayoutConstraint activateConstraints:@[
+            [glass.leadingAnchor constraintEqualToAnchor:host.leadingAnchor],
+            [glass.trailingAnchor constraintEqualToAnchor:host.trailingAnchor],
+            [glass.topAnchor constraintEqualToAnchor:host.topAnchor],
+            [glass.bottomAnchor constraintEqualToAnchor:host.bottomAnchor],
+        ]];
+        
+        // Optional Tahoe tuning:
+        [glass setVariantIfAvailable:5];
+        [glass setScrimStateIfAvailable:0];
+        [glass setSubduedStateIfAvailable:0];
+        
+        // Setting adaptive appearance to 0 is the key to keeping it dark.
+        [glass setAdaptiveAppearanceIfAvailable:0];
+        [glass setUseReducedShadowRadiusIfAvailable:YES];
+        [glass setContentLensingIfAvailable:0];
+    } else {
+        // Fallback on earlier versions
+    }
+    
+    // Optional SwiftUI-like post-filters:
+    //[glass applyVisualAdjustmentsWithSaturation:1.5 brightness:0.2 blur:0.25];
+}
+
+#pragma mark - Content
+
+
+// In TahoeVolumeHUD.m
+
+- (NSView *)buildSliderStrip {
+    NSView *strip = [NSView new];
+    strip.translatesAutoresizingMaskIntoConstraints = NO;
+
+    // Left and Right speaker glyphs are correct
+    NSImageView *iconLeft = [NSImageView new];
+    iconLeft.translatesAutoresizingMaskIntoConstraints = NO;
+    iconLeft.symbolConfiguration = [NSImageSymbolConfiguration configurationWithPointSize:14 weight:NSFontWeightSemibold];
+    iconLeft.image = [NSImage imageWithSystemSymbolName:@"speaker.fill" accessibilityDescription:nil];
+    iconLeft.contentTintColor = NSColor.labelColor;
+    [iconLeft setContentHuggingPriority:251 forOrientation:NSLayoutConstraintOrientationHorizontal];
+    [iconLeft setContentCompressionResistancePriority:751 forOrientation:NSLayoutConstraintOrientationHorizontal];
+
+    NSImageView *iconRight = [NSImageView new];
+    iconRight.translatesAutoresizingMaskIntoConstraints = NO;
+    iconRight.symbolConfiguration = [NSImageSymbolConfiguration configurationWithPointSize:14 weight:NSFontWeightSemibold];
+    iconRight.image = [NSImage imageWithSystemSymbolName:@"speaker.wave.2.fill" accessibilityDescription:nil];
+    iconRight.contentTintColor = NSColor.labelColor;
+    [iconRight setContentHuggingPriority:251 forOrientation:NSLayoutConstraintOrientationHorizontal];
+    [iconRight setContentCompressionResistancePriority:751 forOrientation:NSLayoutConstraintOrientationHorizontal];
+
+    // Create the slider
+    VolumeSlider *slider = [VolumeSlider new]; // Changed from HoverSlider
+    slider.minValue = 0.0;
+    slider.maxValue = 1.0;
+    slider.doubleValue = 0.6;
+    slider.trackingDelegate = self;
+    slider.translatesAutoresizingMaskIntoConstraints = NO;
+    slider.controlSize = NSControlSizeSmall;
+
+    // Assign our custom cell that handles all the drawing
+    VolumeSliderCell *cell = [VolumeSliderCell new]; // Changed from CustomVolumeSlider
+    cell.minValue = 0.0;
+    cell.maxValue = 1.0;
+    cell.controlSize = NSControlSizeSmall;
+    slider.cell = cell;
+
+    [slider setContentHuggingPriority:1 forOrientation:NSLayoutConstraintOrientationHorizontal];
+    [slider setContentCompressionResistancePriority:1 forOrientation:NSLayoutConstraintOrientationHorizontal];
+    self.slider = slider;
+
+    // Add views to the strip - NO MORE trackBackgroundView
+    [strip addSubview:iconLeft];
+    [strip addSubview:slider];
+    [strip addSubview:iconRight];
+
+    // Set up constraints
+    [NSLayoutConstraint activateConstraints:@[
+        [strip.heightAnchor constraintEqualToConstant:36],
+
+        [iconLeft.leadingAnchor constraintEqualToAnchor:strip.leadingAnchor constant:12],
+        [iconLeft.centerYAnchor constraintEqualToAnchor:strip.centerYAnchor],
+
+        [iconRight.trailingAnchor constraintEqualToAnchor:strip.trailingAnchor constant:-12],
+        [iconRight.centerYAnchor constraintEqualToAnchor:strip.centerYAnchor],
+
+        // Slider is now constrained directly between the icons
+        [slider.leadingAnchor constraintEqualToAnchor:iconLeft.trailingAnchor constant:8],
+        [slider.trailingAnchor constraintEqualToAnchor:iconRight.leadingAnchor constant:-8],
+        [slider.centerYAnchor constraintEqualToAnchor:strip.centerYAnchor],
+    ]];
+    
+    return strip;
+}
+
+
+- (NSView *)buildHeaderRow {
+    NSView *row = [NSView new];
+    row.translatesAutoresizingMaskIntoConstraints = NO;
+
+    // Icon (uses the same appIconView instance so other code can update it)
+    self.appIconView = [NSImageView new];
+    self.appIconView.translatesAutoresizingMaskIntoConstraints = NO;
+    self.appIconView.imageScaling = NSImageScaleProportionallyUpOrDown;
+    self.appIconView.wantsLayer = YES;
+    self.appIconView.layer.cornerRadius = 6.0;
+    self.appIconView.layer.masksToBounds = YES;
+
+    // Title label
+    self.titleLabel = [NSTextField labelWithString:@"Place holder"];
+    self.titleLabel.translatesAutoresizingMaskIntoConstraints = NO;
+    self.titleLabel.font = [NSFont systemFontOfSize:12 weight:NSFontWeightSemibold];
+    self.titleLabel.textColor = [NSColor labelColor];
+
+    [row addSubview:self.appIconView];
+    [row addSubview:self.titleLabel];
+
+    // New constraints for better padding and alignment.
+    CGFloat topPadding = 12.0; // Increased to provide more space at the top.
+    CGFloat bottomPadding = 4.0; // Defines space between header and slider strip.
+
+    [NSLayoutConstraint activateConstraints:@[
+        // Icon constraints define the layout and padding for the header row.
+        [self.appIconView.leadingAnchor constraintEqualToAnchor:row.leadingAnchor constant:kSideInset],
+        [self.appIconView.topAnchor constraintEqualToAnchor:row.topAnchor constant:topPadding],
+        [self.appIconView.widthAnchor constraintEqualToConstant:18],
+        [self.appIconView.heightAnchor constraintEqualToConstant:18],
+        
+        // The header row's height is determined by the icon's position and its own padding.
+        [row.bottomAnchor constraintEqualToAnchor:self.appIconView.bottomAnchor constant:bottomPadding],
+
+        // Title label is positioned relative to the icon.
+        [self.titleLabel.leadingAnchor constraintEqualToAnchor:self.appIconView.trailingAnchor constant:8],
+        [self.titleLabel.centerYAnchor constraintEqualToAnchor:self.appIconView.centerYAnchor],
+        [self.titleLabel.trailingAnchor constraintLessThanOrEqualToAnchor:row.trailingAnchor constant:-kSideInset],
+    ]];
+
+    // Good contrast on glass
+    // row.appearance = [NSAppearance appearanceNamed:NSAppearanceNameVibrantDark];
+
+    return row;
+}
+
+#pragma mark - VolumeSliderDelegate
+
+// 5. IMPLEMENT the new delegate methods.
+- (void)volumeSlider:(VolumeSlider *)slider didChangeValue:(double)value {
+    // This is now the method that gets called during a drag.
+    
+    // Selector to match the protocol definition.
+    if ([self.delegate respondsToSelector:@selector(hud:didChangeVolume:forPlayer:)]) {
+        [self.delegate hud:self didChangeVolume:value forPlayer:self.controlledPlayer];
+    }
+    
+    // Reset the auto-hide timer on every value change.
+    [self.hideTimer invalidate];
+    self.hideTimer = [NSTimer scheduledTimerWithTimeInterval:1.2
+                                                      target:self
+                                                    selector:@selector(hide)
+                                                    userInfo:nil
+                                                     repeats:NO];
+}
+
+- (void)volumeSliderDidEndDragging:(VolumeSlider *)slider {
+    if ([self.delegate respondsToSelector:@selector(didChangeVolumeFinal:)]) {
+        [self.delegate didChangeVolumeFinal:self];
+    }
+    
+    // You might also want to reset the hide timer here with a standard delay.
+    [self.hideTimer invalidate];
+    self.hideTimer = [NSTimer scheduledTimerWithTimeInterval:kAutoHide
+                                                      target:self
+                                                    selector:@selector(hide)
+                                                    userInfo:nil
+                                                     repeats:NO];
+}
+
+@end

User interface/HUD/VolumeSlider.h

@@ -0,0 +1,31 @@
+//
+//  VolumeSlider.h
+//  Volume Control
+//
+//  Created by Andrea Alberti on 26.10.25.
+//
+
+#import <Cocoa/Cocoa.h>
+
+@class VolumeSlider;
+
+NS_ASSUME_NONNULL_BEGIN
+
+// 1. Define a delegate protocol to communicate value changes.
+@protocol VolumeSliderDelegate <NSObject>
+- (void)volumeSlider:(VolumeSlider *)slider didChangeValue:(double)value;
+- (void)volumeSliderDidEndDragging:(VolumeSlider *)slider;
+@end
+
+/**
+ An NSSlider subclass that detects mouse hover events and manually handles dragging
+ to ensure it works within a non-activating panel.
+ */
+@interface VolumeSlider : NSSlider
+
+// 2. Add a delegate property.
+@property (nonatomic, weak) id<VolumeSliderDelegate> trackingDelegate;
+
+@end
+
+NS_ASSUME_NONNULL_END

User interface/HUD/VolumeSlider.m

@@ -0,0 +1,84 @@
+//
+//  HoverSlider.m
+//  Volume Control
+//
+//  Created by Andrea Alberti on 26.10.25.
+//
+
+#import "VolumeSlider.h"
+#import "VolumeSliderCell.h" // We need this to access the 'isHovered' property
+
+@implementation VolumeSlider
+
+// This method sets up the tracking area that allows us to receive mouse events.
+- (void)updateTrackingAreas {
+    [super updateTrackingAreas];
+    
+    // Remove any old tracking areas to prevent duplicates
+    for (NSTrackingArea *area in self.trackingAreas) {
+        [self removeTrackingArea:area];
+    }
+    
+    // Tracking always active
+    NSTrackingAreaOptions options = NSTrackingMouseEnteredAndExited | NSTrackingActiveAlways;
+    NSTrackingArea *trackingArea = [[NSTrackingArea alloc] initWithRect:self.bounds
+                                                                options:options
+                                                                  owner:self
+                                                               userInfo:nil];
+    [self addTrackingArea:trackingArea];
+}
+
+// Called when the mouse cursor enters the slider's bounds.
+- (void)mouseEntered:(NSEvent *)event {
+    [super mouseEntered:event];
+    if ([self.cell isKindOfClass:[VolumeSliderCell class]]) {
+        // Tell our custom cell that it's being hovered
+        ((VolumeSliderCell *)self.cell).isHovered = YES;
+        // Trigger a redraw to show the knob
+        [self setNeedsDisplay:YES];
+    }
+}
+
+// Called when the mouse cursor leaves the slider's bounds.
+- (void)mouseExited:(NSEvent *)event {
+    [super mouseExited:event];
+    if ([self.cell isKindOfClass:[VolumeSliderCell class]]) {
+        // Tell our custom cell that the hover is over
+        ((VolumeSliderCell *)self.cell).isHovered = NO;
+        // Trigger a redraw to hide the knob
+        [self setNeedsDisplay:YES];
+    }
+}
+
+- (void)updateValueWithEvent:(NSEvent *)event {
+    // Convert the mouse click location to a point within the slider's bounds.
+    NSPoint point = [self convertPoint:[event locationInWindow] fromView:nil];
+    
+    // Calculate the percentage value based on the horizontal position.
+    CGFloat percentage = point.x / self.bounds.size.width;
+    
+    // Clamp the value between 0.0 and 1.0.
+    percentage = MAX(0.0, MIN(1.0, percentage));
+    
+    // Calculate the actual slider value based on its min/max range.
+    double newValue = self.minValue + (percentage * (self.maxValue - self.minValue));
+    
+    // Update the slider's own value and notify the delegate.
+    self.doubleValue = newValue;
+    [self.trackingDelegate volumeSlider:self didChangeValue:self.doubleValue];
+}
+
+- (void)mouseDown:(NSEvent *)event {
+    [self updateValueWithEvent:event];
+}
+
+- (void)mouseDragged:(NSEvent *)event {
+    [self updateValueWithEvent:event];
+}
+
+- (void)mouseUp:(NSEvent *)event {
+    [self.trackingDelegate volumeSliderDidEndDragging:self];
+}
+
+
+@end

User interface/HUD/VolumeSliderCell.h

@@ -0,0 +1,15 @@
+//
+//  CustomVolumeSlider.h
+//  Volume Control
+//
+//  Created by Andrea Alberti on 25.10.25.
+//
+
+#import <AppKit/NSSliderCell.h>
+
+@interface VolumeSliderCell : NSSliderCell
+
+// This property will control whether the knob is visible.
+@property (nonatomic, assign) BOOL isHovered;
+
+@end

User interface/HUD/VolumeSliderCell.m

@@ -0,0 +1,45 @@
+//
+//  CustomVolumeSlider.m
+//  Volume Control
+//
+//  Created by Andrea Alberti on 25.10.25.
+//
+
+#import "VolumeSliderCell.h"
+#import <AppKit/NSColor.h>
+#import <AppKit/NSBezierPath.h>
+
+@implementation VolumeSliderCell
+- (void)drawBarInside:(NSRect)rect flipped:(BOOL)flipped {
+    // This rect is the area for the bar. We'll make it 4pt tall and centered.
+    rect = NSInsetRect(rect, 0, (NSHeight(rect) - 4.0) / 2.0);
+
+    // 1. Draw the background "track"
+    [[NSColor colorWithWhite:1.0 alpha:0.25] setFill];
+    NSBezierPath *backgroundPath = [NSBezierPath bezierPathWithRoundedRect:rect xRadius:2 yRadius:2];
+    [backgroundPath fill];
+
+    // 2. Calculate the width of the "filled" portion
+    CGFloat percentage = (self.doubleValue - self.minValue) / (self.maxValue - self.minValue);
+    NSRect fillRect = rect;
+    fillRect.size.width = round(NSWidth(rect) * percentage);
+
+    // 3. Draw the active "fill" portion
+    [[NSColor colorWithWhite:1.0 alpha:0.85] setFill];
+    NSBezierPath *fillPath = [NSBezierPath bezierPathWithRoundedRect:fillRect xRadius:2 yRadius:2];
+    [fillPath fill];
+}
+
+- (void)drawKnob:(NSRect)knobRect {
+    if (self.isHovered) {
+        /*
+        CGFloat d = 12;
+        knobRect = NSMakeRect(NSMidX(knobRect)-d/2.0, NSMidY(knobRect)-d/2.0, d, d);
+        [[NSColor whiteColor] setFill];
+        NSBezierPath *circle = [NSBezierPath bezierPathWithRoundedRect:knobRect xRadius:d/2 yRadius:d/2];
+        [circle fill];
+        */
+        [super drawKnob:knobRect]; // Draws Apple's standard system knob
+    }
+}
+@end