[mythtv-users] MythMusic crackling with usb audio out

Phil Wild phil at holobyte.com.au
Tue Jun 11 15:26:16 UTC 2013


I don't know if it is related but I am also getting crackling playing video
files through myth. This is a recent change for me and may have been
introduced after a recent update. Other sources do not show this behaviour.
This is not through USB, it is out HDMI and into a receiver.

I tried upmixing to AC-3 within mythtv to see if that made a difference but
the crackling was still there. Interestingly, upmixing to AC-3 mixed all
the audio channels up.

Cheers

Phil



On 6 June 2013 09:01, Dave Badia <dbadia at gmail.com> wrote:

>
> I've been using MythMusic for some time without issue.  However I recently
> added a usb dac (Micromega MYDAC) to my system and have connected it via
> usb.  When I play my files (flac mostly) through the dac, I get a soft
> crackling sound in the background.
>
> I believe this is something within my myth setup as aplay and mpd both
> work fine through the same usb output using the same ALSA device.   With
> aplay, I converted the file to .wav and ran aplay -Dplughw:1,0 it.wav.  I
> even did a blind a/b test with my wife and she can hear the crackling with
> myth vs aplay as well.
>
> I'm an running 26-fixes 3587b8240a5 on gentoo 3.6.11 and have attached my
> log file with -v audio,general.
>
> Anyone else out there using a usb output for audio?
>
> Thanks
> Dave
>
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