Re: [Alsa-user] Recommendation for Linux OS and Multiple Soundcards?
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From: Bill U. <un...@ph...> - 2006-04-13 14:02:19
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On Thu, 13 Apr 2006, Florian Schmidt wrote: > On Mon, 10 Apr 2006 02:11:25 -0700 (PDT) > Mo <mo...@ya...> wrote: > >> Greetings. >> >> I would like to construct a dedicated system for recording five >> discrete audio feeds (voice-quality) via the line-in jacks each of five >> sound cards. Spent the weekend tinkering, but was never able to get >> any Linux configuration to work fully with more than one card at a >> time, despite each card working independently, and all five working >> together under Windows. >> >> Before I tear the remaining hairs out of my head, if anyone has >> successfully implemented five (cheap) soundcards with Alsa, for >> recording purposes, could you relate your chosen Linux distribution, >> choice of card and any caveats? > > As long as you don't expect sample sync between the seperate soundcards, > it should be verymuch possible to record from 5 different soundcards at > once, i.e. with 5 arecord processes. Has anyone ever studied the timing variations between soundcards? Ie, is it 10^-6 ( which one certainly could get out of a crystal oscillator, but which would correspond to a one sample shiftin about 20sec, and a 100 sample shift in an hour) or worse? Or better? |