OT: Mac Audio Question...

[Reid Conti]

Sorry for the OT, but figured this is a quick and easy question for 
someone out there.

Is there some keyboard shortcut, let's say on the Apple Pro Keyboad, 
that adjusts the audio balance?  Or possibly a keystroke that changes 
the balance in iTunes only?  I am constantly finding my audio balance 
shifted to the left for no apparent reason -- seems to happen every few 
days!  Driving me nuts.. I must be hitting something by accident.. 
thanks!

- reid