Looking at the FreeBSD and Linux drivers, I made a patch that tries to fix
the clcs initialization issues. It made my sound card sound as expected
(non-metallic) most of the time.

Here is the patch : 
http://bill.area51.free.fr/clcsinit.diff

See also the following (open) PRs (maybe the patch fixes some of them) :
http://www.netbsd.org/cgi-bin/query-pr-single.pl?number=12603
http://www.netbsd.org/cgi-bin/query-pr-single.pl?number=12723
http://www.netbsd.org/cgi-bin/query-pr-single.pl?number=23584
http://www.netbsd.org/cgi-bin/query-pr-single.pl?number=24957

Could some clcs users please try it, especially if you have initialization
issues ? If not, it shouldn't break anything, as it does the same thing as
Linux and FreeBSD.

Turtle Beach Santa Cruz owners will need this patch (which also needs
testing, it fixes open PRs kern/18880 and kern/24488):
http://bill.area51.free.fr/santacruz.diff

Thanks.

Stéphane Witzmann