Stéphane Witzmann wrote:

> I'm trying to make my Santa Cruz work with NetBSD 2.0.2. Actually, it
> almost works, it just doesn't produce any sound :
> 
> clcs0 at pci0 dev 11 function 0: Cirrus Logic CS4280 CrystalClear Audio
> Interface (rev. 0x01)
> clcs0: interrupting at irq 11
> clcs0: ac97: Crystal CS4297A codec; headphone, 20 bit DAC, 18 bit ADC,
> Crystal Semi 3D
> clcs0: ac97: ext id 200<AMAP>
> audio0 at clcs0: full duplex, independent
> midi0 at clcs0: CS4280 MIDI UART
> 
> According to PR/18880 and PR/24488, this sound card needs to activate an
> external amp. After modifying ac97.c (and a few other files) accordingly,
> it works, but the sound is very metallic.
> 
> This is not a total surprise, I sometimes have the same problem with
> Linux. There is an easy fix : stop then restart playing. Under NetBSD,
> this doesn't help.
> 
> Any clue ?
> 
> See also : http://mail-index.netbsd.org/current-users/2004/11/28/0008.html
> 
> 
> Stéphane Witzmann

See also the bottom of this one (ALSA driver) :
http://www.alsa-project.org/alsa-doc/doc-php/template.php?company=Turtle+Beach&card=Santa+Cruz.&chip=CS4630&module=cs46xx