[mythtv-users] AC3 2/5.1 channel and normal wave audio recordings all working with timestretch?

[foo bar]

2009/3/2 Debabrata Banerjee <davatar at comcast.net>:
> When timestretch is enabled on an AC3 source, what happens is the
> "passthrough" device is disabled, and the AC3 encoder is enabled, which is
> clearly wrong. I can hack around this issue by setting the default device to
> alsa:iec958, which will make 2-channel AC3 work properly as the 2 channel
> AC3 is decoded, timestretched, re-encoded to 2-channel AC3, and output over
> toslink. OK assume other people's hardware works differently as somehow the
> default audio device can also be used for spdif output??? Regardless -
> switching to a AC3 5.1 file, we appear to follow the same chain, however the
> output stays fixed at 2-channel AC3, which may be ok, but the audio is
> clearly garbled, doesn't look like the encoder and or libsoundtouch knows
> what to do with the extra channels it got. I don't see how this can work for
> anyone else because it's not dependent my hardware.

http://svn.mythtv.org/trac/ticket/5900