Via 82xx Drivers

["John Matthews" <jm169@ohm.york.ac.uk>]

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Greetings,

I am writing to describe a problem I have involving the snd-via82xx audio drivers on 2.6 kernels.  I have updated to the latest alsa-drivers to no avail.

Everything works fine, apart from one small issue.  Certain programs have strange clicks at certain points.  The main example is with fluidsynth http://www.nongnu.org/fluid/   When a note is turned off there is a very loud click which can be louder than the note was - the same type of click that happens when you turn a channel on or off.

This doesn't happen with any other sound card that I have tried (tried a few others including snd-ice1712 on an m-audio delta 410).  It also doesn't happen with the via binary oss style drivers,  "viaudiocombo" which are available from via's website.

The clicks do happen (suprisingly) in exactly the same places with fluidsynth running into jack into snd-via82xx.

I have tried this on various different boards I have around, although they are all types of VIA epia mini-itx boards.

I have also tried dxs_support=1, dxs_support=2,dxs_support=3, dxs_support=4 and this doesn't help.

It may well be the same problem which was noted here.  https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1667

Its meant that I have to use the viaudiocombo drivers for this purpose, and I'd rather use the nice up to date alsa ones!

Please, I would be grateful for any help or thoughts - I am an experienced coder, though I've never worked with device drivers before,

Thanks,

John Matthews,
University of York

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