Re: [LAU] Many identical cards - how to keep them straight

Am Sonntag, 9. März 2008 schrieb Mark Knecht: Probably the one giving that answer was me. It is not entirely impossible. The solution is roughly: 1) You need to keep the clocks of the cards in sync. - Either you got professional cards which allow to sync to adat/world clock/spdif. Then its easy, just make them all sync to the same source. - If you don't have that high cards: Break out your soldering iron, unsolder the time-giving quartz on all the soundcards except one and feed the quartz-signal from that "master" to all the "slaves". Now the cards don't fire interrupts at different times, because of different sample-rates. (48kHz on one card is _always_ different then 48kHz on another card if the clocks aren't synced.) But they still fire individual interrupts... 2) Break out you kernel-hacking skills and mask all the interrupt from the soundcards except for one. 3) Fiddle around with an .asoundrc to create one big sound-device out of all these to-sync-devices. There are people who did this. (Search the web and the archives for el-cheapo.) But its not easy. And if you aren't fixed on "as cheap as possible" it is easier and more reliable and more stable and of higher soundquality to just buy a sounddevice that works and has the needed number of channels. That is why my answer is: It is not possible. Because it involves fiddling with a lot of very advanced stuff and voids warranty on the devices if you unsolder the quartz... Have fun, Arnold -- visit http://www.arnoldarts.de/ --- Hi, I am a .signature virus. Please copy me into your ~/.signature and send me to all your contacts. After a month or so log in as root and do a "rm -rf /". Or ask your administrator to do so...