I'm wondering if there is a setting for MONO or STEREO on the 522. The reason I ask is because I have the 522 going into my TV and audio comes out of the TV and into my receiver. The surround speakers are not outputting sound on any channel. --- and it was just working a few feeks ago! Nothing has changed in my setup... and I know the speakers are working because there is a test mode that makes all the speakers play... my only thought is.. surround doesn't work in MONO.... only stereo. The TV is set to stereo... but that doesn't mean its receiving stereo.... any thoughts?