diff --git a/Audio/Output/OutputCoreAudio.m b/Audio/Output/OutputCoreAudio.m
index 3b2a0f19e..04e2806d0 100644
--- a/Audio/Output/OutputCoreAudio.m
+++ b/Audio/Output/OutputCoreAudio.m
@@ -679,12 +679,16 @@ current_device_listener(AudioObjectID inObjectID, UInt32 inNumberAddresses, cons
 
 	_au.outputProvider = ^AUAudioUnitStatus(AudioUnitRenderActionFlags *_Nonnull actionFlags, const AudioTimeStamp *_Nonnull timestamp, AUAudioFrameCount frameCount, NSInteger inputBusNumber, AudioBufferList *_Nonnull inputData) {
 		// This expects multiple buffers, so:
+		if(!frameCount) return 0;
+
 		int i;
 		const int channels = format->mChannelsPerFrame;
+		if(!channels) return 0;
+
 		const int channelsminusone = channels - 1;
-		float buffers[frameCount * format->mChannelsPerFrame];
+		float buffers[frameCount * channels];
 		uint8_t bufferlistbuffer[sizeof(AudioBufferList) + sizeof(AudioBuffer) * channelsminusone];
-		AudioBufferList *ioData = (AudioBufferList *)(bufferlistbuffer);
+		AudioBufferList *ioData = (AudioBufferList *)(&bufferlistbuffer[0]);
 
 		ioData->mNumberBuffers = channels;