gistfile1.m

-(void)setAmbient:(id)args
{
  NSError* error = nil;
  BOOL success = [[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryAmbient error: &error];
  if (!error || !success) {
    DebugLog(@"Could not set category");
  }
}

-(void)setAmbientDuckOthers:(id)args
{
  NSError* error = nil;
  BOOL success = [[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryAmbient
                                                  withOptions: AVAudioSessionCategoryOptionDuckOthers
                                                        error: &error];
  if (!error || !success) {
    DebugLog(@"Could not set category");
  }
}