I recently purchased a Yamaha HTR-5790 receiver and configured it with L and R front, center and L and R surround speakers using the YPAO mic and auto config procedure. No subwoofer.
Question: The front panel display on the receiver, when Im first watching video with 5.1 output, shows all five channels as active (L, C, R, SL, SR) plus an LFE channel. Then, the receiver switches modes automatically and shows only the front L and R channels as active. There is audio from all speakers but I don't know if it is simulated 5.1. What am I doing wrong?
When I first set up the receiver, to the TV I had a DVI to HDMI cable and a coaxial digital audio IN. All five channels appeared as active on the receiver panel and the panel also showed mulptiple active DSP fields. Now I have just an HDMI cable (new box) and only the front L and R channels show as active.
Input mode is Auto. EX mode is OFF so as to default to 5.1. Sound is coming from the TV via coaxial digital. The TV audio is set to Stereo. The Comcast cable box is set to audio Pass Through in the system menu and advanced/matrix/no compression in the setup menu. Digital coax audio out to receiver.