Not a DVR problem, but posting in case others have had this experience and have a solution. Have a second 722K, but did not want to buy an OTA adapter like I have on the first one. Connected a digital antenna to the TV's Antenna Input and selected that as my input source. Video comes in just fine, but on all channels, the sound is nothing but a "motorboat" noise, that is no voices come through, just this "motorboat" sound. Occurs on all channels/sub-channels. Has anyone run across this?