Follow-up. Just saw the hint in "Windows Media Player and Mac Os10.4.2"
post about checking the audio output level with the Audio MIDI Setup
utility. I'll give that a try tomorrow. Hopefully, it's that simple
Problem fixed. However, the audio output was at 44.1, so I did the
following: deleted all WMP prefs, the internet plugin, and the
application. Repaired permissions, reinstalled WMP, repaired
permissins, launche GarageBand, launched WMP and changed some prefs,
relaunch WMP and reset the prefs to defaults, quit it, and ran the
sample movie w/SOUND. Don't know exactly what fixed what, but the
problem's solved.