[mythtv-users] Raspberry Pi - Audio Passthrough

[airdrummer]

rob e wrote:
> ok, it's working ... both AC3 and DTS pass through beautifully and no impact to
> video
> my receiver reports 5.1 sound and video is no longer impacted in any way

> based on these
> https://github.com/raspberrypi/linux/issues/997
> https://gist.githubusercontent.com/julianscheel/9094131/raw/af99299b11d32693abb07481698b1f963a423076/bcm2835.conf

> add a new file
> /usr/share/alsa/cards/bcm2835.conf
> with the content above (second link)
>
> reboot
>
> then select the new IEC958 option in Audio setup, no mixer ... and Bob's your uncle

i finally got around to checking this out...and with both peter's and curtis's 
builds, audio is perfect...but only on some channels:-( the 2 local pbs stations 
(weta26 & wmpt22) just now were both showing antiques roadshow, so i could 
compare (supposedly) identical feeds: both 1080, but 26's sound breaks up badly 
while 22's is fine:-\

turning off stereo upscale cures the breakup, but it's quite muffled:-\
w.a.f->0