When several combinations of TiVo (live or playback) pause/rewind/fastforward -to- resume forward, audio stops in the TV.
By experimentation we have found that HDMI audio is restored when any of the following are done:
- turn off/on TV
- unplug/plug in HDMI cable
- cycle thru any combination of TV INPUTS, and back to the HDMI being used.
Cycling thru any TiVo options does NOT restore the audio (live vs. recording vs. random combinations, channel flipping, etc.)
It's interesting that during when the audio is failing for TV programming (recorded or live),
if i switch to TiVo system setup menus, certain TiVo menu contexts do sound the keystroke click and the tuner signal strength pitches -- but these are TiVo-box-generated sounds as opposed to live TV or recorded program audio.
When the audio is failing, both the TV spkrs and the LINE OUT are silent. I do not know
about the TV's digital optical output.
To make the situation happen ( = audio fail), it seems to be triggered by any of a number of seemingly random sequences. i've not taken the time to log exact sequences and see
if it's repeatable. sometimes it's just one pause, most of the time just one pause and resume does NOT trigger it.
I'm unfamiliar with the HDMI handshake protocol, and thus do not know how to
debug whose "fault" this is (TiVo or Vizio, or an unfortunate combination).
Because the TiVo-generated sounds do always come thru, i'm suspecting it's a TiVo
problem. I just want some more information before i spend grueling hours with TiVo support
who may not be able to cope with technical details.
There is some discussion on the web about TiVo and audio systems, but i could not
find this behavior (Vizio or other brand).
Anyone have experience with this type of problem, or suggestions for further debugging?