Have downloaded the Quick time Player on both Netscape and Explorer. On all the music the sound is very distorted. No problem with Real one Player or Windows Media Player or other audio players. The video is OK. Any ideas??

Apple provides a list of steps (http://support.apple.com/kb/TS1362) to take to try to hunt down and correct QuickTime audio playback issues.

More than likely, an update will take care of the issue.