AudioQueueDispose delay

I successfully immediately stop my audio playback by:

-(void)stopAudio    {        @synchronized(audioLock) {            audioLock=[NSNumber numberWithBool:false];            OSStatus err;            err=AudioQueueReset (_audioQueue);            if (err != noErr)            {                NSLog(@"AudioQueueReset() error: %d", (int)err);            }            err=AudioQueueStop (_audioQueue, YES);            if (err != noErr)            {                NSLog(@"AudioQueueStop() error: %d", (int)err);            }            err=AudioQueueDispose (_audioQueue, YES);            if (err != noErr)            {                NSLog(@"AudioQueueDispose() error: %d", (int)err);            }        }    }

And in my:

void audioCallback(void *custom_data, AudioQueueRef queue, AudioQueueBufferRef buffer)

I only put more stuff in my queue if:

myObject *weakSelf = (__bridge myObject *)custom_data;@synchronized(weakSelf -> audioLock) {    if ([weakSelf -> audioLock boolValue]) {         Put_more_stuff_on_queue    }

In my particular case I playback AAC-LC audio.