I used a pink floyd pulse dvd "audio set up" to test my 5.1 set up. What I found was:
Left and right front speakers ok.
Sound for "Center speaker" seemed to be a combination of all three front speakers
rear surround speakers, seemed to be recognized as the front speakers
the sub woofer was not recognized.
The acoustimas set-up runs the front three speakers through the sub-woofer and then out from the SW to the 3 front speakers =>it is difficult to figure out what is causing the problem.
Thoughts ?