peds48 -
sorry it took me a couple of days to get around to this. As expected, I bypassed the AVR and went direct to the TV and still experienced sound cut-outs. I did a little more troubleshooting and confirmed that this only appears to occur when the DirecTV receiver is set to output in Dolby Digital mode. If I switch to PCM, the cutouts do not occur. Obviously, switching to Dolby (particularly for movies) is not desirable. I can repeat this at will streaming content from Sprout On-Demand.