I have a new Sharp Aquos LCD TV (Model LC-32GP1U) and to keep things short, here's my setup:
Input 3 - HD Cable box connected via composite cables
Input 4 - Xbox 360 connected via HDMI
I have a digital audio cable connected to the TV's digital optical audio output going to a cheap home theater receiver's digital audio input. The cable box works fine with my surround sound system, but the Xbox isn't producing any sound through it (only through the TV's speakers). Since the cable box works, I know it's not a home theater setup/digital audio cable problems. So what's the problem here?