Mac Audio issues

I installed the latest XCode, and it looks like it totally horked the audio on my poor PowerBook. iTunes doesn't make a peep. Video has no sound. VLC sometimes produces audio, but in random bursts. sigh. Mostly sound is just DOA. There isn't even any sound when rebooting.

Any one have any suggestions? I guess I could try uninstalling XCode...

[Update] I rebooted off the Tiger boot disc but didn't actually reinstall. Sounds now works again. I have no idea what changed but at least I have music again!