"my sound bar has started switching from Digital1 to PCM by itself. It goes silent for a second each1 answer10/31/1002/24/11
believe it or not this is completely normal. i own this soundbar and
this happens all the time. PCM is an audio format going to the
soundbar. when the source (tv, DVD) has a pcm output signal, the
soundbar will recognize it and adjust. there is absolutely nothing
wrong with the sound bar. Happy Listening P.S. if you are still
confused, just ask me to leave another comment explaining better."
More at http://www.samsung.com/us/support/owners/product/HW-C451/XAA and be sure the firmware is current (be sure the model numbers match!)
I bought a Samsung HW-D450 Sounbar from Best Buy this week and the sound has been great until last night. The sound will randomly stop working (although it seems to happen more often when I switch from one chanel to another) and I have to power off the soundbar & then turn it back on for it to start working again.
I have it hooked directly to my LG 47LH30 LCD TV with the optical wire provided and I have Comcast Digital cable.