I'm getting an annoying hum/buzz coming from my front speakers when playing sources via HDMI 1.3 inputs (Sony BDP-S350 blu-ray player and Comcast DVR). I've tried everything and with XLR cables from the DTC-9.8 to my front speaker amp have managed to get the hum/buzz down to a reasonable level (but it's still there).
There's something weird going on with the way the DTC-9.8 processes HDMI inputs because I noticed the hum/buzz level dropped when I switched off the HDMI audio through to my HDTV (DTC-9.8 menu 7.5). Turning this option off prevents audio from being sent through the DTC-9.8 HDMI output. The change also causes something else strange to happen with the DTC-9.8 display. With the HDMI output set ON (menu 7.5), the DTC-9.8 displays "HDMI Audio Through" and the speaker icons for the rear speakers are empty. But with the HDMI output set OFF (7.5), the DTC-9.8 displays the incoming audio bitstream (e.g., Dolby Digital, DTS HD Master, etc.) and the rear speaker icons display LR and RR correctly.
Is anyone else having these hum/buzz issues? I don't know whether to send the DTC-9.8 to Integra repair or not.