[pvrusb2] Sound Problems

[Mike Isely]

On Fri, 28 Jul 2006, Martin Carpella wrote:

> Hello,
>
> first, thanks to the author for his very impressive work on this driver!
> It (almost) all worked like a charm.
>
> Unfortunately, I have some problems regarding sound/audio:
> I am currently in the stage of working with "cat /dev/video0 > tmp.mpg",
> as I have not yet set up a working TV application. Video works fine, but
> sound almost always is only a crackling noise, nothing similar to the
> audio on the channel. Once or twice it worked, but stopped immedeatly
> after stoping the current dump and starting a second one.
>
> I confess, I'm not really sure what to do about it. I also
> double-checked that the device is not muted ;) I copied the mpg to
> antoher PC to verify it is no problem with the sound card. And as I
> said, once or twice it already worked.
>
> The relevant parts of the dmesg output is pasted below. The device is a
> 24xxx model. I also tried the various PAL modes, just to be sure. Once
> it seemded to work when changing the frequency during dumping from
> /dev/video0, but it was not reproducible.

Martin:

I understand that in PAL areas, audio demodulation can be tricky and that 
the tda9887 configuration factors greatly into this.  But the intermittent 
messed-up symptoms you're describing smells like a possible hardware 
problem.  Can you get the device working cleanly in Windows?...

   -Mike

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