auto-muting pcm when not in use

[Frank v Waveren]

I have an el-cheapo sound card in my desktop machine, which works fine
for the odd mail notification sound. However, it tends to produce
quite some white noise and a highpitched tone when not in use. I
vaguely remember some buzz (well, at least a light hum) a while back
about automatically setting the mixer to zero for synth/pcm when not
in use.. Was there ever a patch created for this, and if not, would
anyone be interested in one?

-- 
Frank v Waveren                                      Fingerprint: 0EDB 8787
fvw@[var.cx|stack.nl|dse.nl|chello.nl] ICQ#10074100     09B9 6EF5 6425 B855
Public key: hkp://wwwkeys.pgp.net/[e-mail]            7179 3036 E136 B85D