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copied!<p>answering my own question....</p> <p>further searching on SO led me to implementing this alternate solution:</p> <pre><code>- (void)setupAudio { [[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error: nil]; UInt32 doSetProperty = 1; AudioSessionSetProperty (kAudioSessionProperty_OverrideCategoryMixWithOthers, sizeof(doSetProperty), &doSetProperty); [[AVAudioSession sharedInstance] setActive: YES error: nil]; } </code></pre> <p>this was gleaned from <a href="https://stackoverflow.com/questions/1507541/avaudioplayer-turns-off-ipod-how-to-work-around/1507629#1507629">here</a></p> <p>**EDIT **UPDATED****</p> <p>I have since made this into a class that also pre-initialises the audio queue (useful in both simulator and device as it eliminates the startup lag from the playback of the first audio file. </p> <p>you can find the point1sec.mp3 here: <a href="http://www.xamuel.com/blank-mp3s/" rel="nofollow noreferrer">http://www.xamuel.com/blank-mp3s/</a></p> <pre><code>#import <AVFoundation/AVFoundation.h> #import "AudioToolbox/AudioServices.h" @interface sw_AVAudioPlayerSetup : NSObject <AVAudioPlayerDelegate> { } + (void)setupAudio ; + (void)setupSharedSession ; @end @implementation sw_AVAudioPlayerSetup + (void)setupSharedSession { static BOOL audioSessionSetup = NO; if (audioSessionSetup) { return; } [[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error: nil]; UInt32 doSetProperty = 1; AudioSessionSetProperty (kAudioSessionProperty_OverrideCategoryMixWithOthers, sizeof(doSetProperty), &doSetProperty); [[AVAudioSession sharedInstance] setActive: YES error: nil]; audioSessionSetup = YES; } + (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag{ // delegate callback to release player [player release]; } + (void)setupAudio { [self setupSharedSession]; NSString *filepath = [[NSBundle mainBundle] pathForResource:@"point1sec" ofType:@"mp3"]; if ([[NSFileManager defaultManager] fileExistsAtPath:filepath]) { AVAudioPlayer* player = [[AVAudioPlayer alloc] initWithContentsOfURL: [NSURL fileURLWithPath:filepath] error:nil]; player.delegate = (id <AVAudioPlayerDelegate>) self; [player play]; } } </code></pre>

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