Bose lifestyle 38 system, sound problems

"Hide" the remote from the unit for a while and see if that helps...accordianman

Call Bose and get the latest software for your system. This will solve the problem.
Details:
I had the exact same problem with my Lifestyle 48 system connected to a Dish Networks satellite box (Vip622). The sound would continually switch between 'Dolby Digital 2.0', 'Dolby Digital' and 'Dolby Digital 5.1'.
I called Bose Tech Support and they had me reset all of the components. This helped for a short time but it was still happening. They told me that the problem was with the Satellite box, since the Bose system just output what it was receiving and didn't do anything else. We also determined that my system software was quite old. They said that the software wouldn't make any difference, but I got them to send it out anyway.
Well, when the new software update arrived, I installed it on my Bose system and have not had any audio switching problems. So the Bose system software update seemed to fix the problem.