Record the sound and play it back with changed pitch

Question

I have to implement a iphone application which will record user\'s voice as you starts speaking, and change the pitch of the recorded sound and play it back. I am able to record

Answer 1

Actually there is an easier solution. Use the rate feature of the audio player. It ranges between 0.1f - 2.0f where higher number means faster and squeekier pitch and lower number means slow dragged out sound (deep voice)

player = [[AVAudioPlayer alloc] initWithContentsOfURL:
                  [NSURL fileURLWithPath:path] error:&err];
        player.volume = 0.4f;
        player.enableRate=YES;
        [player prepareToPlay];
        [player setNumberOfLoops:0];
        player.rate=2.0f;
        [player play];