I had this question in HTPC but not much traffic there.
My Yammy HTR-5550 has 4 optical inputs but there seems to be buzzing or hissing with certain digital signals (but i havent figured out specifics) from movies. The EQ is stuck on "Rock Concert" making voices distant and hollow/tinny sounding. This is on the "MD/CD-R" input (TiVo is on "D-TV/CBL" and my DVD player is on "DVD" input, each sound great all the time). The 4th input is V-AUX and no sound comes through that at all.
When I hook my HTPC to the D-TV/CBL input voices sound fine but all sound from movies I've digitized to the Hard Drive have a buzz/hiss on top of it.
I told my wife its because the receiver trying to play certain digital signals that it can't fully decode or whatever. I hope I'm wrong so I don't have to buy a new receiver. BUT! if I'm right I got the green light to buy a new receiver, it just better solve the issue.
Please help! I just want clean sound, I don't care how I get it.
