[linux-audio-user] Re: linux-audio-user Digest, Vol 15, Issue 111 - Linux-audio-user

26 Dec 2004

...
  I have two audio cards:

 (integrated)
 00:11.5 Multimedia audio controller: VIA Technologies, Inc.
 VT8233/A/8235/8237 AC97 Audio Controller (rev 50)
 using driver: snd_via82xx

 (PCI)
 00:0c.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 07)
...
  using driver: snd_emu10k1

 I connected the two with a spdif connector because the internal one seems
 to have a better ADC than emu10k1
 (Sblive external Digital Out jack to Internal Spdif IN)

 When I play any file on the sblive, and ONLY if I listen it on the other
 card, I hear a click every 3 seconds. If I listen to the file directly
 from sblice line out it's OK.

 Maybe it's because of drift (of ~3hz) of the two card spdif clock. How can
 I make the two card sync'ed? 
Hi Stefano,

I'm a newbie in Linux-Audio world, but maybe this can help you: using
"alsamixer hw:x" where x is your card hardware id (mounting 2 cards you
should have hw:0 and hw:1) be sure that integrated VIA card is setted to get
clock signal from s/pdif input.
If it's setted to internally generate clock signal you will have a drift
between VIA and SB card, causing "clicks" you are hearing.

Hope it helps!

Bye
Michele