Is speed control over music on an iPhone plausible?

Question

I'm writing an iphone app, and I would like to have the user able to slow or quicken a pre-made sound file. Is this possible? If so, how would you do it?

Edit:

This looks like a dup of the following post:

http://stackoverflow.com/questions/1191313/iphone-sound-adjust-speed-of-playback-of-audio-file-while-playing

Answer 1

AFAIK, altering playback speed is available as a user control for podcasts (not programatically), but not for music.

Answer 2

Check out this post:

http://stackoverflow.com/questions/1191313/iphone-sound-adjust-speed-of-playback-of-audio-file-while-playing