GB, GBA Audio: Increase max audio volume

CHANGES

@@ -55,6 +55,7 @@ Misc:
  - GBA Savedata: Remove ability to disable realistic timing
  - Qt: Add load alternate save option
  - GB Audio: Improved audio quality
+ - GB, GBA Audio: Increase max audio volume
 
 0.6.3: (2017-04-14)
 Bugfixes:

src/gb/audio.c

@@ -627,7 +627,7 @@ void GBAudioSamplePSG(struct GBAudio* audio, int16_t* left, int16_t* right) {
 		}
 	}
 
-	int dcOffset = audio->style == GB_AUDIO_GBA ? 0 : 0x1FC;
+	int dcOffset = audio->style == GB_AUDIO_GBA ? 0 : 0x20A;
 	*left = (sampleLeft - dcOffset) * (1 + audio->volumeLeft);
 	*right = (sampleRight - dcOffset) * (1 + audio->volumeRight);
 }
@@ -637,8 +637,8 @@ static void _sample(struct mTiming* timing, void* user, uint32_t cyclesLate) {
 	int16_t sampleLeft = 0;
 	int16_t sampleRight = 0;
 	GBAudioSamplePSG(audio, &sampleLeft, &sampleRight);
-	sampleLeft = (sampleLeft * audio->masterVolume) >> 6;
-	sampleRight = (sampleRight * audio->masterVolume) >> 6;
+	sampleLeft = (sampleLeft * audio->masterVolume * 9) >> 7;
+	sampleRight = (sampleRight * audio->masterVolume * 9) >> 7;
 
 	mCoreSyncLockAudio(audio->p->sync);
 	unsigned produced;

src/gba/audio.c

@@ -253,7 +253,7 @@ static int _applyBias(struct GBAAudio* audio, int sample) {
 	} else if (sample < 0) {
 		sample = 0;
 	}
-	return ((sample - GBARegisterSOUNDBIASGetBias(audio->soundbias)) * audio->masterVolume) >> 3;
+	return ((sample - GBARegisterSOUNDBIASGetBias(audio->soundbias)) * audio->masterVolume) >> 2;
 }
 
 static void _sample(struct mTiming* timing, void* user, uint32_t cyclesLate) {