Objective C: OpenAL code
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what code do i need to make a source directory in OpenAL

>alSourcef(source, AL_PITCH, myPitch)

my audio file came from AVAudioRecorder..

>recorder = [[ AVAudioRecorder alloc] initWithURL:url settings:recordSetting error:&err];

 i want to change the pitch at the playback button which is from my AVAudioPlayer...
>recorderFilePath = [NSString stringWithFormat:@"%@/MySound.caf", DOCUMENTS_FOLDER];
    NSURL *urlRecord = [NSURL fileURLWithPath:recorderFilePath isDirectory:NO];

my question is... what do i need to do to change the pitch at the playback button...using OpenAL, what is the code for locating my source in OpenAL so that i can play what i've recorded earlier..