I've been having instances of lost sound when watching our DirecTV HR24 HD-DVR, both on live shows and on playback of recorded material on the DVR. I use the HDMI connection from the DVR into my Krell S-1200 processor. Over the last month or so, the sound will suddenly shut off completely (almost always occurs this way) or occasionally just leave one channel playing. I sent the DVR back and got another one, same problem. I used a different HDMI cable, same problem. I plugged the HDMI cable into a different HDMI input on the Krell, same problem.
Conversation with Krell suggested that the HDMI board in the processor may be faulty. Since DirecTV is constantly switching audio types when going to commercial and back to the show, etc., the board may be having trouble tracking all these "ticks". I have no problems when playing other HDMI sources (Blu-ray or DVD-A player, different players...) into the Krell. The problem is manifested only with the satellite box, and is increasing in severity.
There is an adjustment in the Krell for "Dolby hold", which apparently locks onto the sound codec for the specified period of seconds. I've adjusted this, at Krell's suggestion, all over the place from 1 second up to 20 seconds without improvement.
Is there anything you folks can think of that might be another cause? If not, it's packing up the Krell for repair and complete loss of my music/HT system for the interim.