[mythtv] WinTV GO and btaudio... no sound

Robert Dege mythtv-dev@snowman.net
Sat, 21 Dec 2002 23:20:51 -0500 (EST)

Ya know, that makes sense.  I always thought that tvaudio was needed to
send the audio to the line-out port.  So I rmmod'ed msp3400, btaudio, and
tvaudio, and was still able to hear audio from line-out on the the card
with xawtv.  Unless bttv is failing to correctly auto-detect the correct
sound chip on the card... but that's probably reaching.

I think the thing that confused me the most is that I thought several
people on the list claimed to get btaudio working with the WinTV-Go card.
I'll have to read through the list archives & check that out.

I'd really hate to get a different WinTV card to get this setup working.


> Robert Dege wrote:
> > I too am having difficulty getting btaudio to work with my WinTV-GO (190).
> > I can get line-out (WinTV) -> line-in (sound) working with no problems
> > with xawtv.
> >
> > However, it doesn't seem as if btaudio is capturing any data even when I
> > specifically point xawtv to btaudio's digital dsp.  Even when Running
> > aplay on the digital dsp (/dev/dsp1), I still receive no audio.
> >
> >
> > Here's what I noticed:
> >
> > when I modprobe bttv, tvaudio get loaded instead of btaudio, even if I
> > alias char-major-81-1 btaudio in the modules.conf.
> >
> > if I modprobe msp3400 & btaudio, i2c-core shows reference to msp3400, but
> > not to btaudio.
> >
> > When I run the sox command shown below, I recieve no audio.
> >
> > When I insmod the btaudio module, it does detect the card, and outputs no
> > error messages.
> I tried btaudio a couple days ago and never got any output.
> Here's what I'm guessing is going on. Anyone, PLEASE correct
> me if this is wrong.
> I think the btaudio module happily loads if there is a bttv
> device present. However, it the card does not have an audio
> chip like the msp3400 then there is nothing to be read from
> the /dev/dsp* devices that the btaudio module creates.
> Donno if this is correct. I only know that I don't have these
> chips, I haven't gotten it to work and there's not much
> documentation on how it's supposed to work.
> --  bjm
> bttv0: Hauppauge eeprom: model=62471, tuner=Philips FM1236 (2), radio=yes
> bttv0: using tuner=2
> bttv0: i2c: checking for MSP34xx @ 0x80... not found
> bttv0: i2c: checking for TDA9875 @ 0xb0... not found
> bttv0: i2c: checking for TDA7432 @ 0x8a... not found
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