I recently purchased a new setup consisting of Samsung HW-E550 sound bar, Panasonic 55UT50 plasma TV and being in Canada I connected via TELUS cable TV and ADSL.
I have the sound bar connected to the TV via optical audio cable, and the TV connected to the cable box via HDMI.
For 99% of the time, I have no issues. However, maybe once a day, the sound will suddenly change and a very distinctive echo will appear, sounding like someone is trying to speak under water. I have searched everywhere online for a solution however there doesn't seem to be much out there with this similar intermittent issue.
The closest possible answer I have been able to find is interference from other devices - could this be the case? On my TV stand I have both the cable box and wireless modem as well as the sound bar and obviously the TV itself.
The random echo appears and sometimes goes away after about one minute, but mostly before this I just switch channels which instantly fixes the problem. I have tried moving the other devices around as best I can and separating these however the problem still seems to appear randomly. I have made sure that the TV speakers are turned off, as I know this causes an echo in a lot of cases.
I know it is only a minor issue, but nevertheless an annoying one as I am always thinking to myself "it is about time for another echo to appear, I wonder when it will come?"
Anyone able to offer some information on this?