[mythtv] [mythtv-commits] Ticket #1104: multi channelaudio support
mark at digivation.com.au
Wed Feb 6 00:36:24 UTC 2008
>There was actually one problem, when playing a stereo recording
>with 5.1 up mixing the front speaker volume was about 6 db too
>low in volume when compared to an AC3 recording.
Ive noticed variations in how this is encoded. perhaps MP3 sound works
differently to AC32 and AC35.1
I noticed with the AC3 5.1->2.0 switching clip that centre was low in 5.1
mode and ok in 2.0 mode. this means there may be a problem with 5.1 decode
in the internal ac3dec. not sure yet. I dont have too many 5.1 non HD
recordings to test with.
no dts 5.1 clips to test with.
>I'm just testing to make sure there are no regressions in other output
>methods. They don't actually have to have 5.1 sound available.
ac3passthru may be slightly broken in 47 so Ill attach 48 which has this
fix. untested of course for pasthru because I cant :-)
otherwise if seems fine on my 2ch frontend so far. all 2chmode stuff should
note for AC3 passthru setup, always set maxchannels to 2 as otherwise the
alsa sound device doesnt open correctly.
More information about the mythtv-dev