AudioQueueStart fails when iphone app running in background iOS4.0

Question

I'm having difficulties starting the AudioQueue when my app is in the background with iOS4.0 The code works fine when the app is active, but fails with -12985 code when running in the background.

        err = AudioQueueStart( queueObject, NULL );


        if( err )
        {
            NSLog(@"AudioQueueStart failed with %d", err);
                = NO;
AudioQueueStop(queueObject, YES);
            return;
        }

For the code above, err is set to -12985

Answer 1

I've since learned that re-using an audioqueue from the background works just fine. You just can't start new.

Answer 2

I'm having the same issue. But even when I AudioQueuePause in background and then AudioQueueStart with the same AudioQueue, I get the -12985 error.

Answer 3

Making sure that my AudioSession was active fixed the problem: Previously in code I had set the session to inactive between song changes before starting a new song:

AudioSessionSetActive(false);

Once I removed this AudioQueueStart works just fine from the background.