This is exactly what I wanted to know, thanks guys!
I asked because I currently have a
Gateway 610 XL All-In-One,
and when using the Digital Optical Audio (which sounds great),
the onboard speakers are not muted, and I have to keep a 'dummy'
stereo cable plugged into the headphone jack. This wouldn't be
possible though on the iMac (when I get it in October) because
the Optical Audio and Stereo Audio come from the same "hole".
If anyone knows more about Digital Optical Audio, and could tell
me how I could mute the onboard speakers of the Gateway
(possibly through Windows), I would be very grateful!
Thanks again.
Christopher