diff --git a/configure.py b/configure.py
index 909d5daeb..fc81bb48a 100755
--- a/configure.py
+++ b/configure.py
@@ -769,7 +769,7 @@ config.libs = [
             Object(Matching,    "JSystem/JAudio/JASDvdThread.cpp"),
             Object(Matching,    "JSystem/JAudio/JASCallback.cpp"),
             Object(Matching,    "JSystem/JAudio/JASRate.cpp"),
-            Object(NonMatching, "JSystem/JAudio/JASHardStream.cpp"),
+            Object(Matching,    "JSystem/JAudio/JASHardStream.cpp"),
             Object(Matching,    "JSystem/JAudio/JASHeapCtrl.cpp"),
             Object(Matching,    "JSystem/JAudio/JASResArcLoader.cpp"),
             Object(Matching,    "JSystem/JAudio/JASProbe.cpp"),
diff --git a/include/JSystem/JAudio/JASDSPChannel.h b/include/JSystem/JAudio/JASDSPChannel.h
index cf0061404..ba1fc83fd 100644
--- a/include/JSystem/JAudio/JASDSPChannel.h
+++ b/include/JSystem/JAudio/JASDSPChannel.h
@@ -40,6 +40,7 @@ namespace JASystem {
         static int getNumBreak();
 
         u8 getNumber() { return mNumber; }
+        u8 getStatus() { return mStatus; }
         u8 getPriority() { return mPriority; }
         void setPriority(u8 priority) { mPriority = priority; }
         u16 getPriorityTime() { return mPriorityTime; }
@@ -58,12 +59,11 @@ namespace JASystem {
         // TODO: inlines
         void checkSign(u32) {}
         void isFree() {}
-        void getStatus() {}
         void forceStop(TDSPChannel*) {}
         void release(TDSPChannel*, u32) {}
 
         /* 0x00 */ u8 mNumber;
-        /* 0x01 */ u8 field_0x1;
+        /* 0x01 */ u8 mStatus;
         /* 0x02 */ u8 field_0x2;
         /* 0x03 */ u8 mPriority;
         /* 0x04 */ u16 mPriorityTime;
diff --git a/include/JSystem/JAudio/JASDSPInterface.h b/include/JSystem/JAudio/JASDSPInterface.h
index 22e45170e..09cb83d01 100644
--- a/include/JSystem/JAudio/JASDSPInterface.h
+++ b/include/JSystem/JAudio/JASDSPInterface.h
@@ -124,6 +124,20 @@ namespace JASystem {
         void initBuffer();
         FXBuffer* getFXHandle(u8 param_1);
 
+        // TODO inlines
+        inline void boot(void (*)(void*)) {}
+        inline void finishWork(u16) {}
+        inline void flushChannel(u8) {}
+        inline void restart() {}
+        inline void setBusConnect(u8, u8, u8) {}
+        inline void setFXLine(u8, s16*, FxlineConfig_*) {}
+        inline void setMixerInitDelayMax(u8, u8) {}
+        inline void setMixerInitVolume(u8, u8, s16, u8) {}
+        inline void setMixerVolume(u8, u8, s16, u8) {}
+        inline void setPauseFlag(u8, u8) {}
+        inline void setPitch(u8, u16) {}
+        inline void sync(u32, u32, u32) {}
+
         extern u16 SEND_TABLE[12];
         extern u32 DOLBY2_DELAY_BUF[];
         extern u16 JAS_DSP_PREFIX;
diff --git a/include/JSystem/JAudio/JASHardStream.h b/include/JSystem/JAudio/JASHardStream.h
index ba97f1513..94e60b4d0 100644
--- a/include/JSystem/JAudio/JASHardStream.h
+++ b/include/JSystem/JAudio/JASHardStream.h
@@ -76,18 +76,18 @@ namespace JASystem {
             /* 0x0B */ u8 field_0xb;
             /* 0x0C */ f32 field_0xc;
             /* 0x10 */ f32 field_0x10;
-            /* 0x14 */ int field_0x14;
-            /* 0x18 */ int field_0x18;
-            /* 0x1C */ int field_0x1c;
+            /* 0x14 */ u32 field_0x14;
+            /* 0x18 */ u32 field_0x18;
+            /* 0x1C */ u32 field_0x1c;
             /* 0x20 */ f32 field_0x20;
             /* 0x24 */ f32 field_0x24;
             /* 0x28 */ f32 field_0x28;
             /* 0x2C */ f32 field_0x2c;
             /* 0x30 */ f32 field_0x30;
             /* 0x34 */ f32 field_0x34;
-            /* 0x38 */ int field_0x38;
-            /* 0x3C */ int field_0x3c;
-            /* 0x40 */ int field_0x40;
+            /* 0x38 */ u32 field_0x38;
+            /* 0x3C */ u32 field_0x3c;
+            /* 0x40 */ u32 field_0x40;
             /* 0x44 */ u32 field_0x44[2];
             /* 0x4C */ u8 field_0x4c;
         };
diff --git a/src/JSystem/JAudio/JASDSPChannel.cpp b/src/JSystem/JAudio/JASDSPChannel.cpp
index 134862670..2e46dcbe1 100644
--- a/src/JSystem/JAudio/JASDSPChannel.cpp
+++ b/src/JSystem/JAudio/JASDSPChannel.cpp
@@ -16,7 +16,7 @@
 /* 8028963C-80289694       .text init__Q28JASystem11TDSPChannelFUc */
 void JASystem::TDSPChannel::init(u8 param_1) {
     mNumber = param_1;
-    field_0x1 = 1;
+    mStatus = 1;
     field_0x8 = 0;
     mCBInterval = 0;
     mCallback = NULL;
@@ -27,14 +27,14 @@ void JASystem::TDSPChannel::init(u8 param_1) {
 
 /* 80289694-80289720       .text allocate__Q28JASystem11TDSPChannelFUl */
 int JASystem::TDSPChannel::allocate(u32 param_1) {
-    if (field_0x1 != 1) {
+    if (mStatus != 1) {
         return false;
     }
     BOOL r0 = (field_0x8 == 0) ? TRUE : FALSE;
     if (!r0) {
         OSReport("sign %x があるのにCH.%d はFREE\n", field_0x8, mNumber);
     }
-    field_0x1 = 0;
+    mStatus = 0;
     field_0x8 = param_1;
     mPriority = 1;
     field_0xc->allocInit();
@@ -43,7 +43,7 @@ int JASystem::TDSPChannel::allocate(u32 param_1) {
 
 /* 80289720-8028973C       .text free__Q28JASystem11TDSPChannelFv */
 void JASystem::TDSPChannel::free() {
-    field_0x1 = 1;
+    mStatus = 1;
     mPriority = 0;
     mCallback = NULL;
     field_0x8 = 0;
@@ -54,10 +54,10 @@ int JASystem::TDSPChannel::smnUse;
 
 /* 8028973C-802897E0       .text forceStop__Q28JASystem11TDSPChannelFv */
 bool JASystem::TDSPChannel::forceStop() {
-    if (field_0x1 == 2) {
+    if (mStatus == 2) {
         return false;
     }
-    if (field_0x1 == 1) {
+    if (mStatus == 1) {
         OSReport("----- JASDSPChannel::forceStop Warning! : CH_FREE\n");
         return false;
     }
@@ -67,7 +67,7 @@ bool JASystem::TDSPChannel::forceStop() {
     smnUse--;
     field_0xc->field_0x10a = 1;
     field_0xc->flushChannel();
-    field_0x1 = 2;
+    mStatus = 2;
     return true;
 }
 
@@ -119,7 +119,7 @@ JASystem::TDSPChannel* JASystem::TDSPChannel::alloc(u32 param_1, u32 param_2) {
     }
     int i = 0;
     do {
-        BOOL r0 = DSPCH[i].field_0x1 == 1 ? TRUE : FALSE;
+        BOOL r0 = DSPCH[i].getStatus() == 1 ? TRUE : FALSE;
         if (r0 && DSPCH[i].allocate(param_2)) {
             smnFree--;
             smnUse++;
@@ -131,22 +131,22 @@ JASystem::TDSPChannel* JASystem::TDSPChannel::alloc(u32 param_1, u32 param_2) {
 }
 
 /* 80289A54-80289AF4       .text free__Q28JASystem11TDSPChannelFPQ28JASystem11TDSPChannelUl */
-int JASystem::TDSPChannel::free(JASystem::TDSPChannel* param_1, u32 param_2) {
-    if (!param_1) {
+int JASystem::TDSPChannel::free(JASystem::TDSPChannel* dspch, u32 param_2) {
+    if (!dspch) {
         OSReport("----- JASDSPChannel::free : NULL のチャネルを解放しようとしました\n");
         return -1;
     }
-    if (param_1->field_0x8 != param_2) {
+    if (dspch->field_0x8 != param_2) {
         OSReport("----- JASDSPChannel::free : BAD USERが開放を試みた\n");
         return -2;
     }
-    if (param_1->field_0x1 == 0) {
+    if (dspch->getStatus() == 0) {
         smnUse--;
     }
-    if (param_1->field_0x1 != 1) {
+    if (dspch->getStatus() != 1) {
         smnFree++;
     }
-    param_1->free();
+    dspch->free();
     return 0;
 }
 
@@ -157,16 +157,16 @@ JASystem::TDSPChannel* JASystem::TDSPChannel::getLower() {
     u32 r29 = 0;
     for (u8 i = 0; i < 64; i++) {
         u8 r27;
-        TDSPChannel* dspch = DSPCH + i;
-        if (dspch->field_0x1 == 2) {
+        TDSPChannel* dspch = &DSPCH[i];
+        if (dspch->getStatus() == 2) {
             continue;
         }
-        if (dspch->field_0x1 == 1) {
+        if (dspch->getStatus() == 1) {
             r30 = i;
             break;
         }
         if (dspch->mCallback) {
-            r27 = dspch->mPriority;
+            r27 = dspch->getPriority();
             if (r27 <= r31) {
                 JUT_ASSERT(305, i == dspch->getNumber());
                 if (r27 != r31 || dspch->field_0xc->field_0x10c >= r29) {
@@ -177,21 +177,26 @@ JASystem::TDSPChannel* JASystem::TDSPChannel::getLower() {
             }
         }
     }
-    return DSPCH + r30;
+    return &DSPCH[r30];
 }
 
 /* 80289C0C-80289D10       .text getLowerActive__Q28JASystem11TDSPChannelFv */
 JASystem::TDSPChannel* JASystem::TDSPChannel::getLowerActive() {
-    /* Nonmatching */
-    u8 r29 = 0xff;
-    u8 r28 = 0;
-    u32 r27 = 0;
-    for (u8 i = 0; i < 64; i++) {
-        TDSPChannel* dspch = DSPCH + i;
-        if (dspch->field_0x1 == 2 || dspch->field_0x1 == 1) {
+    /* Nonmatching - regalloc */
+    u8 i;
+    u32 r27;
+    u8 r29;
+    u8 r28;
+    u8 r30;
+    r29 = 0xff;
+    r28 = 0;
+    r27 = 0;
+    for (i = 0; i < 64; i++) {
+        TDSPChannel* dspch = &DSPCH[i];
+        if (dspch->getStatus() == 2 || dspch->getStatus() == 1) {
             continue;
         }
-        u8 r30 = dspch->mPriority;
+        r30 = dspch->getPriority();
         if (r30 <= r29) {
             JUT_ASSERT(345, i == dspch->getNumber());
             if (r30 != r29 || dspch->field_0xc->field_0x10c >= r27) {
@@ -201,16 +206,16 @@ JASystem::TDSPChannel* JASystem::TDSPChannel::getLowerActive() {
             }
         }
     }
-    return DSPCH + r28;
+    return &DSPCH[r28];
 }
 
 /* 80289D10-80289DC8       .text breakLower__Q28JASystem11TDSPChannelFUc */
 BOOL JASystem::TDSPChannel::breakLower(u8 param_1) {
     TDSPChannel* dspch = getLower();
-    if (dspch->mPriority > param_1) {
+    if (dspch->getPriority() > param_1) {
         return false;
     }
-    if (dspch->field_0x1 != 1) {
+    if (dspch->getStatus() != 1) {
         if (dspch->mCallback) {
             dspch->onUpdate(3);
         } else {
@@ -227,10 +232,10 @@ BOOL JASystem::TDSPChannel::breakLower(u8 param_1) {
 /* 80289DC8-80289E68       .text breakLowerActive__Q28JASystem11TDSPChannelFUc */
 bool JASystem::TDSPChannel::breakLowerActive(u8 param_1) {
     TDSPChannel* dspch = getLowerActive();
-    if (dspch->mPriority > param_1) {
+    if (dspch->getPriority() > param_1) {
         return false;
     }
-    if (dspch->field_0x1 != 1) {
+    if (dspch->getStatus() != 1) {
         if (dspch->mCallback) {
             dspch->onUpdate(3);
         }
@@ -270,7 +275,7 @@ void JASystem::TDSPChannel::updateAll() {
         }
         dspBuffer = DSPCH[i].field_0xc;
         TDSPChannel* dspChannel = &DSPCH[i];
-        if (dspChannel->field_0x1 == 1) {
+        if (dspChannel->getStatus() == 1) {
             continue;
         }
         if (dspBuffer->field_0x2 != 0) {
@@ -280,7 +285,7 @@ void JASystem::TDSPChannel::updateAll() {
             dspBuffer->field_0x2 = 0;
             dspBuffer->field_0x0 = 0;
             dspBuffer->flushChannel();
-            if (dspChannel->field_0x1 == 1) {
+            if (dspChannel->getStatus() == 1) {
                 continue;
             }
         }
@@ -318,7 +323,7 @@ void JASystem::TDSPChannel::onUpdate(u32 param_1) {
 int JASystem::TDSPChannel::getNumBreak() {
     int count = 0;
     for (int i = 0; i < 64; i++) {
-        if (DSPCH[i].field_0x1 == 2) {
+        if (DSPCH[i].getStatus() == 2) {
             count++;
         }
     }
diff --git a/src/JSystem/JAudio/JASHardStream.cpp b/src/JSystem/JAudio/JASHardStream.cpp
index b44c3e439..0e1e3c50a 100644
--- a/src/JSystem/JAudio/JASHardStream.cpp
+++ b/src/JSystem/JAudio/JASHardStream.cpp
@@ -230,7 +230,7 @@ void JASystem::HardStream::getAddrCallback(s32 param_1, DVDCommandBlock* param_2
     }
 }
 
-static float dummy1() {
+static f32 dummy1() {
     return 0.0f;
 }
 
@@ -297,6 +297,9 @@ static void dummy2() {
     OSReport("[JASHardStream::registBgmPair] このペア(%d)にはイントロ／ループともにありませんので登録できません。\n");
     OSReport("new_list != 0");
     OSReport("[JASHardStream::playBgm] まだ前の曲が再生中ですので、新たに開始できません。\n");
+    OSReport("[JASHardStream::main] ファイルが開けません。(%s)\n");
+    OSReport("finfo != 0");
+    OSReport("");
 }
 
 /* 8027C5B4-8027C648       .text fileOpen__Q38JASystem10HardStream8TControlFUsP11DVDFileInfo */
@@ -382,7 +385,65 @@ u8 JASystem::HardStream::TControl::getCurVol() {
 
 /* 8027C900-8027CB5C       .text calcCurVolume__Q38JASystem10HardStream8TControlFv */
 void JASystem::HardStream::TControl::calcCurVolume() {
-    /* Nonmatching */
+    f32 f0 = 1.0f;
+    f32 f30 = 1.0f;
+    f32 f29 = 1.0f;
+
+    if (field_0x14 != 0) {
+        if (field_0x38 == 0)
+            field_0x20 = 1.0f / (f32)field_0x14;
+
+        f30 = field_0x20 * (f32)field_0x38;
+
+        if (f30 >= 1.0f) {
+            f30 = 1.0f;
+            field_0x14 = 0;
+            field_0x20 = 0.0f;
+            field_0x38 = 0;
+        } else {
+            ++field_0x38;
+        }
+    }
+
+    if (field_0x18 != 0) {
+        if (field_0x3c == 0)
+            field_0x24 = 1.0f / (f32)field_0x18;
+
+        f29 = 1.0f - field_0x24 * (f32)field_0x3c;
+
+        if (f29 <= 0.0f) {
+            f29 = 0.0f;
+
+            resetFader();
+            field_0xb  = 6;
+
+            unregistBgmAll();
+        } else {
+            ++field_0x3c;
+        }
+    }
+
+    if (field_0x1c != 0) {
+        if (field_0x40 == 0)
+            field_0x34 = (field_0x28 - field_0x30) / (f32)field_0x1c;
+
+        f32 fVar2 = field_0x34 * (f32)field_0x40 + field_0x30;
+        if (field_0x40 >= field_0x1c) {
+            fVar2 = field_0x28;
+            field_0x30 = fVar2;
+            field_0x28 = field_0x30;
+            field_0x1c = 0;
+            field_0x34 = 0.0f;
+            field_0x40 = 0;
+        } else {
+            ++field_0x40;
+        }
+        field_0x2c = fVar2;
+    }
+
+    f0 *= field_0x2c * (f30 * f29);
+    f0 *= field_0xc;
+    field_0x10 = f0;
 }
 
 /* 8027CB5C-8027CB9C       .text volFloatToU8__Q38JASystem10HardStream8TControlFf */