I have been listening to XM radio through DTV, and the stereo sound is not working properly... I have been listening to my HR20, as well as an older E-1 receiver with 2 different audio receivers... I have noticed that a few songs that have stereo separation are missing sound... Sound that should come out of one channel does not come out at all, but both speakers are working and playing sound. MY HR20 is running Optical audio cable to an Integra 5.1 receiver. My E-1 is running RCA to a Onkyo 2 channel receiver. I have noticed it for a long time, but always thought it was me. I also noticed that throughout my house, my audio is not sync'd... I can have any station on 2 different tv's, and the audio is off by almost a second. Any ideas?