Allow audio samples to be played back from anywhere in memory rather than ARAM.

This is accomplished through a new mAramBaseAddress field on the DSP channels, which effectively relocates ARAM for that channel.

libs/JSystem/src/JAudio2/JASBank.cpp

@@ -33,7 +33,7 @@ JASChannel* JASBank::noteOn(JASBank const* param_0, int param_1, u8 param_2, u8
         return NULL;
     }
     intptr_t wavePtr = waveHandle->getWavePtr();
-    if (!wavePtr) {
+    if (!wavePtr IF_DUSK(&& !waveHandle->getAramBaseAddress())) {
         return NULL;
     }
 
@@ -44,6 +44,9 @@ JASChannel* JASBank::noteOn(JASBank const* param_0, int param_1, u8 param_2, u8
     channel->setPriority(param_4);
     channel->field_0xdc.mWaveInfo = *waveInfo;
     channel->mWaveAramAddress = wavePtr;
+#if TARGET_PC
+    channel->mAramBaseAddress = waveHandle->getAramBaseAddress();
+#endif
     channel->field_0xdc.mChannelType = stack_60.field_0x1c;
     channel->setBankDisposeID(param_0);
     channel->setInitPitch(stack_60.mPitch * (waveInfo->mSampleRate / JASDriver::getDacRate()));

libs/JSystem/src/JAudio2/JASChannel.cpp

@@ -26,6 +26,9 @@ JASChannel::JASChannel(Callback i_callback, void* i_callbackData) :
     mCallback(i_callback),
     mCallbackData(i_callbackData),
     mUpdateTimer(0),
+#if TARGET_PC
+    mAramBaseAddress(nullptr),
+#endif
     mBankDisposeID(NULL),
     mKey(0),
     mVelocity(0x7f),
@@ -256,6 +259,9 @@ s32 JASChannel::initialUpdateDSPChannel(JASDsp::TChannel* i_channel) {
     switch (field_0xdc.mChannelType) {
     case 0:
         i_channel->setWaveInfo(field_0xdc.mWaveInfo, mWaveAramAddress, mSkipSamples);
+#if TARGET_PC
+        i_channel->mAramBaseAddress = mAramBaseAddress;
+#endif
         break;
     case 2:
         i_channel->setOscInfo(mOscillatorSomething);