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  • From: sindi keesan <keesan AT sdf.lonestar.org>
  • To: baslinux AT lists.ibiblio.org
  • Subject: [BL] onboard via686 (via82cxxx_audio.o) sound
  • Date: Mon, 26 Feb 2007 00:10:57 +0000 (UTC)

I had to remove the network card to put in an internal modem (no free slots) so spent two hours identifying onboard sound to free up another slot.

No name on the board that I can see. I copied the numbers off the northbridge (VIA VT82C694T) near the cpu and the southbridge (VIA VT82C686B). It was hard to read upside down under the desk but is NOT 6868 or 68CB as other people read it.

I then spent an hour trying to identify the motherboard by these numbers and "1 ISA" "5 PCI" "2 COM" "3 DIMM". No luck.

Searched on the chip numbers and audio and it is via686 audio controlled by the southbridge chip (similarly to the i810).

99% of the online info for this sound is for ALSA, which gave people a lot
of trouble due to conflicts with ethernet card. The chip is found in some laptops.

OSS module is via82cxxx_audio.o and it compiled with a 'make modules' after I changed the two related lines to m instead of 'is not set'. make menuconfig saves having to go through the whole thing.

make config (or make menuconfig)
make dep
(DO NOT make clean)
make modules - it only made this one module but took a while looking at the
others - is there a better way to make one module?

Instructions said to insmod soundcore and ac97_codec first. What it really needed was:

soundcore
sound
uart401
ac97_codec
via82cxxx_audio

There is supposed to be some midi support included.

Like the i810, it supports only 48KHz so play does not work, nor does mpg123 (No supported rate found!). The files are 44KHz and 32KHz.

Timidity and mplayer (online for a few minutes, at 44K) work. Sounds okay, and plenty loud enough with powered speakers. I will leave it enabled (without SB-PRO legacy sound support, which did not work in DOS or linux) and think about whether to put back the ethernet card or leave the SB-LIVE in there (which sounds better).

Timidity says 'audio buffer is too small'. But works perfectly.

No more tripping over the external modem. ;=) !!!!!!

The next computer has onboard CMI8738 which compiled but has unresolved symbols.

Radio slows down email a lot.

Sindi



keesan AT sdf.lonestar.org
SDF Public Access UNIX System - http://sdf.lonestar.org




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