I use my oppo 93 to play music over usb. When playing albums i like to turn the tv off, however when i do the music stutters. I have the oppo connected to my amp via hdmi 2 and to the tv via hdmi 1. I tried using the optical output as i thought it may be an hdmi issue, the optical output has stopped working on the oppo though. No idea how I managed to mess up the optical output.