[mythtv-users] Multiple cards with different audio sample rates

[Michael T. Dean]

On 06/02/06 00:09, Michael Lynch wrote:

>I have 2 cards in my backend, one bttv based with audio cable from
>line-out to line-in and one saa713x card that captures audio from the
>pci bus.
>
>The bttv card needs to have a sample rate of 48000 or the audio gets
>terrible (humming) and the saa713x card needs to have a sample rate of
>32000.  Herein lies my problem.  With the audio sample rate set to
>48000 for the 'Live TV' recording profile, the bttv audio is perfect,
>but the saa713x audio turns to chipmunks.  If it change the 'Live TV'
>audio sample rate to 32000 to accomodate the saa713x card, the bttv
>card begins to hum.
>
>Being that both cards are 'Analog V4L capture card' card types when
>setting up recording profiles I can not figure out what to do.  I have
>tried setting up a custom recording profile, but since both cards are
>'Analog V4L capture card' then the audio is still messed up.
>
>Any ideas how to set different recording profiles for 2 v4l based
>cards with different audio needs?
>

The problem with 32kHz isn't your recording profile, it's your 
(playback) ALSA configuration.  
http://www.mythtv.org/wiki/index.php/DigitalSoundHowTo#Setting_up_ALSA.27s_.asoundrc.2C_Properly

Fix that and you can play back the 32kHz audio without problems.

Mike