Originally Posted by png5
HDMI(digital) audio sound a lot better than A/V(red/white) audio out.
Especially on a home theater setup! Definitely use optical or coaxial audio, if available on both the TV and the Pioneer. Both are digital.
If your only options are L/R (red/white) audio from the TV or passing HDMI through the Pioneer, you'll have to compromise. HDMI will give you the best sound on HD channels, but your home theater setup will only play audio from the HDMI input (the Homeworx). L/R audio from the TV will follow the video on the screen, but it'll just be simple stereo. (Your Pioneer might be able to synthesize the missing channels so it may sound OK, but it won't sound the way it was meant to.)
If your Pioneer has a remote, you could make both connections (pass HDMI through and hook up L/R audio from the TV too) and switch between them as needed with the remote.