M CHANGES → CHANGES

@@ -168,6 +168,7 @@ - Qt: Fix patch loading while a game is running
  - Qt: Fix shader selector on Ubuntu (fixes mgba.io/i/767)
  - GB Serialize: Fix timer serialization
  - GB Audio: Fix incorrect channel 4 iteration
+ - GB Audio: Fix zombie mode bit masking
 Misc:
  - Qt: Add language selector
  - GBA Timer: Improve accuracy of timers

M src/gb/audio.c → src/gb/audio.c

@@ -702,6 +702,7 @@ envelope->initialVolume = GBAudioRegisterSweepGetInitialVolume(value);
 	if (!envelope->stepTime) {
 		// TODO: Improve "zombie" mode
 		++envelope->currentVolume;
+		envelope->currentVolume &= 0xF;
 	}
 	_updateEnvelopeDead(envelope);
 	envelope->nextStep = envelope->stepTime;