Audio Issues with New TV - Panasonic TC-L42ET5
by BLeClair12 - 8/13/12 11:37 AM
This issue has been perplexing me for a few days now. I can't seem to figure out what could be causing it, but it's getting to be quite annoying.
I got a new TV last week (Panasonic TC-L42ET5). Immediately after connecting it, I started having issues with my receiver (Sony HT-SS370 HTiB), unlike anything I've experienced with it before. My previous TV was a Sony, so I know it's likely to play a bit nicer with that, but I'd also had it connected to a cheap Samsung in the past with no issues.
The receiver seems to only want to output 2 channel LPCM. I first noticed it on my cable box. Where I'd usually be getting a Dolby Digital indicator, I was only getting PCM. I wasn't getting any 5.1 audio from any channel without switching the sound field away from A.F.D. Standard, where I always have it. I think I've narrowed it down to it being an issue with the TV providing the receiver with a list of capable output formats. Obviously, the TV is only two channels, and thus, I'm getting two channels.
I went into the cable box service menu (it's a Time Warner Motorola DCX3400 Dual Tuner HD-DVR if that is of any use to anyone) to see if any settings have changed. They hadn't. I've never played with audio here before, but I figured I'd switch the audio output from "auto" to "passthrough". This seems to solve the issue on the cable box. I've been getting Dolby Digital and 5.1 where applicable. The problem is, I can't seem to save this setting on the cable box (even though I never shut it off). Once I shut the TV off, it reverts back, and I have to change it again.
This passthrough setting is less than ideal, because I like to use the TV speakers at night when I go to bed. This means manually going in and changing the audio output from "passthrough" to "auto" at night, and then again the next day, etc.
I should also note that when the cable box runs LPCM, I get a noticeable audio delay that the box's "auto" lip-sync feature can't correct. Switching to passthrough and getting Dolby Digital back seems to correct the issue.
I thought this was an isolated issue to the cable box. When I turned on my X-Box 360 tonight, I found otherwise. It too is only receiving 2 channel LPCM instead of Dolby Digital. The system menu output is set to Dolby Digital 5.1, but I'm getting nothing or the sort. I sought advice online and fixed the issue by shutting off "Display Discovery". It seems as though the TV was, again, reporting back what it could handle, and not what the receiver could handle.
The only device I've yet to check is the PS3, but that is always set to output LPCM. Last I checked, it was outputting 5.1 just fine.
I've also been having issues getting ARC to function properly. I shut Viera Link off (I thought it was causing an audio delay) initially, but turned it on to test the ARC feature on Viera Connect. I can only get Viera Connect to play out of the TV's internal speakers. I'm not currently running an optical cord from the TV to the receiver, because I thought the ARC channel served the same purpose. Am I doing something wrong here? Ideally, I'd like to avoid running an optical cable from the TV. I'm running an optical cable into the "TV" input on the receiver from my PS3 for 3D Blu-Ray playback (the receiver cannot handle 3D passthrough). It is not currently plugged in, so I would assume that can't be causing the issue.
What could be going on here? I've got so many variables that I'm racking my brain. The only new things introduced into the mix were the TV, and a new high speed HDMI cable from Amazon from the receiver out to the TV in. Nothing else has changed. Any help would be greatly appreciated.
I suppose my primary goal is to get the TV to stop reporting its audio capability to my other devices so that the receiver can properly handle and decode them. It seems these "Smart" TVs are too smart for their own good!