Originally Posted by Smurfmj
Just joined for Forum
and I am a oppo 103 owner of about 6 weeks.
The issue: variable length of audio delay relative to lip movement on screen when running my cable TV through the HDMI input and through to my TV. It doesn't happen all of the time, but I have noticed it more and more lately and I thought I was just being too picky, but when my wife started noticing it too, there must be something off! It can be anywhere from a quarter second, to a full second, and really no rhyme or reason for the cause. If I turn off the cable box and Oppo and turn them back on, it usually does away with it for a bit, but a few minutes later it could return.
Known problem. I have it too, running my HTPC's WMC extender (Linksys DMA2100) through the external HDMI input of the 103.
Exactly as you've observed, the lip-sync will not be present initially. But over time it builds up. And doing something to interrupt or restart things (like STOP and RESUME, or STOP and change channels and PLAY for a moment and then STOP and change channels back to where you were and then PLAY again, etc.) usually seems to make it go away for a while.
But it will inevitably return again.
My own observations are that it only happens (for me) when both audio+video are delivered out over HDMI-1 of the Oppo to my AVR (my audio output is set to LPCM). Video is then delivered from AVR to HDTV, and audio is sent by the AVR to speakers. This is my situation when I do "casual watching+listening" to HDTV through external speakers connected to my AVR, which is why I'm sending audio as well as video out over HDMI-1.
However if I power on my external audio system (headphones-based, requiring LPCM via HDMI) connected via HDMI to HDMI-2 out of the Oppo, using "Split A/V" on the Oppo so that now audio-only is going out over HDMI-2 (and then on to my headphone system) and video-only is going out over HDMI-1 (to the AVR, and then on to the HDTV), I've seen that the Oppo lip-sync problem does not occur. I use this approach when doing "serious watching+listening" to BluRay or HDTV through headphones.
I have spoken to Oppo several times about this problem, and they are well aware if it. Presumably that means they will eventually discover the cause and fix it in a future firmware upgrade.
You are not alone here. But I agree, it is very very annoying.
I am going to experiment today with another "possible solution" of my own, to see if that works to prevent the symptom.
Since my external speakers are simply a 2.0 stereo set (not a multi-channel surround system, which is why I have my headphone system instead for "serious" situations), I see no reason I can't just feed the FL/FR analog speaker outputs to a pair of analog L/R stereo inputs on my AVR with the 103 setup set to "downmix to stereo" (which will handle multi-channel audio source HDTV programs).
The digital-to-analog conversion for supporting speakers has to occur somewhere, so I might as well use the DAC in the Oppo and produce the stereo downmix to analog there, then going through an all-analog audio path to the AVR and 2.0 speakers beyond. This also allows me to insert my DBX 14/10 EQ for "tone control", as my old 2.0 B&W speakers need a bit more treble-enhancement than the AVR is willing to add.
I'm hoping that the lip-sync issue with audio+video out over HDMI-1 of the Oppo will simply disappear using this all-analog audio approach. Actually, even if it doesn't work to overcome the lip-sync problem I suspect I will use it anyway because of the ability to have my EQ improve the audio quality from the the 2.0 speakers, which right now is a bit "boomy" for my tastes.
I will report back.