[mythtv-users] btaudio question

[Joseph A. Caputo]

On Sunday 23 November 2003 22:50, RJV wrote:
> I've got a LM 9.2 box and I've got the btaudio installed.
>
> I verify that the cable has sound by using the analog out of the
> wintv card and the analog in of the sound-card.
>
> Then, I run this command when watching xawtv: sox -c 1 -w -r 44100 -t
> ossdsp /dev/dsp -t ossdsp /dev/dsp and I get sound from the speakers
> and can mute the analog-in portion in kmix and hear the TV.
>
> However, if I unplug the patch cable, I don't get digital sound. 
> Does the digital sound go directly through the PCI bus, or is it sent
> digitally to the soundcard from the patch cable?

btaudio (if it works on your card) creates 2 new dsp devices (the actual 
device names will vary with you installation, but mine are /dev/dsp1 
& /dev/dsp2, for digital & analog capture, respectively).  These 
devices capture right off the PCI bus of the tuner card, no patch cable 
necessary.  Note that the btaudio devices are usually locked to a 32000 
Hz sample rate.  So, to test this using your command above, you'd 
change it to:

sox -c 1 -w -r 32000 -t ossdsp /dev/dsp1 -t ossdsp /dev/dsp

or something like that.

Keep in mind that btaudio may not work on your card.

-JAC