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POSound plays in iphone simulator with breakpoint, but fails to play without breakpoint
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copied!<p>I am trying to get a sound to play in the iPhone Simulator (using 3.1 SDK). When I add a breakpoint, and step through the code in GDB, the sound plays. However, if I disable the breakpoint, the sound does not play.</p> <p>The code to invoke the sound is:</p> <pre><code>SoundEffect *completeSound = [myobj completeSound]; if (completeSound != nil) { [completeSound play]; } </code></pre> <p>The SoundEffect class has a simple play method:</p> <pre><code>// Plays the sound associated with a sound effect object. -(void)play { // Calls Core Audio to play the sound for the specified sound ID. AudioServicesPlaySystemSound(_soundID); } </code></pre> <p>If I enable a breakpoint above the "myobj completeSound" method, it plays perfectly. However, if there's no breakpoint, no sound is emitted.</p> <p>The audio file is a CAF file that's 5 seconds in length.</p> <p>Is there some delay that I need to add after invoking AudioServicesPlaySystemSound to ensure that it plays?</p> <p>UPDATE: it appears that using the AudioServicesAddSystemSoundCompletion method is the solution.</p> <pre><code>SoundEffect *completeSound = [myobj completeSound]; if (completeSound != nil) { AudioServicesAddSystemSoundCompletion([completeSound _soundID], NULL, NULL, AudioPlaybackComplete, self); [completeSound play]; } </code></pre> <p>Then the AudioPlaybackComplete static function is invoked when the audio clip is done. This works properly - although I still do not understand why the audio clip fails in the initial use case.</p>

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