OS is Windows 7 64-bit. Both sound drives are updated; there are no other obvious problems. All streaming video (or audio) sounds are garbled. This began a few days ago. The sounds are like alien/electronic sounds. Windows Media player is OK; Flash is current (I just checked on the Adobe site).
I deleted the cache folders (at %appdata%\Adobe and \Macromedia); no change. Rebooted; no change.
HOWEVER: This is limited to Chrome. Just tried it with IE and the sound's fine. I guess I should ask this on a Chrome forum. (They suggest asking on a Flash forum; this was addressed a while ago and there is a link: