diff --git a/source/funkin/game/PlayState.hx b/source/funkin/game/PlayState.hx
index 0282a465..cac4e5c8 100644
--- a/source/funkin/game/PlayState.hx
+++ b/source/funkin/game/PlayState.hx
@@ -1421,10 +1421,10 @@ class PlayState extends MusicBeatState
 			__vocalSyncTimer = 1;
 
 			final instTime = FlxG.sound.music.getActualTime();
-			var isOffsync:Bool = vocals.loaded && Math.abs(instTime - vocals.getActualTime()) > 6;
+			var isOffsync:Bool = vocals.loaded && Math.abs(instTime - vocals.getActualTime()) > 12;
 			if (!isOffsync)
 				for (strumLine in strumLines.members)
-					if ((isOffsync = strumLine.vocals.loaded && Math.abs(instTime - strumLine.vocals.getActualTime()) > 6))
+					if ((isOffsync = strumLine.vocals.loaded && Math.abs(instTime - strumLine.vocals.getActualTime()) > 12))
 						break;
 
 			if (isOffsync) resyncVocals();
diff --git a/source/lime/_internal/backend/native/NativeAudioSource.hx b/source/lime/_internal/backend/native/NativeAudioSource.hx
index 30f9fbb2..2b602dc0 100644
--- a/source/lime/_internal/backend/native/NativeAudioSource.hx
+++ b/source/lime/_internal/backend/native/NativeAudioSource.hx
@@ -470,16 +470,16 @@ class NativeAudioSource {
 		var i:Int, source:NativeAudioSource, process:Int;
 
 		while ((i = Thread.readMessage(true)) != 0) {
+			streamMutex.acquire();
 			while (i-- > 0) {
 				if ((source = streamSources[i]).parent.buffer == null) {
 					source.stopStream();
 					continue;
 				}
-				streamMutex.acquire();
 				process = source.requestBuffers < STREAM_MIN_BUFFERS ? STREAM_MIN_BUFFERS - source.requestBuffers : 0;
 				source.fillBuffers(STREAM_PROCESS_BUFFERS > process ? STREAM_PROCESS_BUFFERS : process);
-				streamMutex.release();
 			}
+			streamMutex.release();
 		}
 
 		threadRunning = false;