Sound input problems on Shuttle SN68PTG5

[Les]

On Tue, 2008-04-29 at 07:44 +0100, Mike Evans wrote:
> Tim wrote:
> 
> > Just in case it helps, I've seen a similar thing with Audacity on all
> > the PCs that I've run it on (each with different hardware).  With no
> > audio input, the VU meters show one channel wildly fluttering about, and
> > with increased gain over the other.  With a signal, it's somewhat
> > similar (fluttering meter, mismatched left versus right gain, but the
> > audio records pretty much okay).  In the end, I plugged the computer
> > into a real audio mixer, ran tests to find the nominal and clipping
> > levels, then ignored the metering on the computer.
> 
> Thanks for your thoughts.  The PC I've replaced with the new Shuttle one 
> doesn't seem to have this problem and I have used it for converting some 
> old cassette recordings to OGG-Vorbis.  That just had an ancient 
> 2-channel Soundblaster card.  The audacity meters worked pretty much as 
> you would expect.  I may yet raid it for that card and dump the on-board 
> on the Shuttle.
> 
> I have tried ignoring the meter and recording using this chipset, but 
> the noise is worse than I would get on a cheap tape recorder, and only 
> records on the left channel, which is useless.  Running under Vista it 
> records quite acceptably.  Hurumph!
> 
Have you tried removing pulse audio?  That really messed up my wife's
system.

Regards,
Les H