On Saturday 14 May 2005 15:14, NiXO Beee wrote: > I'v been googlin' a bit but to no avail. > In the machine I'm preparing there is an onboard nforce2 audio chipset wich > I'd like to use to output some secondary signals (the first card is an OK > emu10k1, with every in and out working properly.) > Is there a tutorial somewhere that explains how to do that ? > Do I have to launch another Jack daemon or can the first one handle two > sound cards ? The reasons why this can work or can not work where discussed various time on this and other lists. The main reason is: The two cards are running with different quartzes and therefor with (slightly) different sampling rates. So basicly one of the cards is requesting the data earlyer than the other => you get glitches and the software will produce error. A solution would be to create an alsa-plugin which adds a jitter-buffer but this introduces latencies. Another approach is described in the el-cheapo-howto [http://www.djcj.org/LAU/quicktoots/toots/el-cheapo/], another one is in the alsa-docs [http://www.alsa-project.org/alsa-doc/doc-php/asoundrc.php?company=Generic&card=Generic&chip=Generic&module=Generic#virmulti]. While I think the first approach works (haven't tested due to the lack of two cards of the same type) I can confirm the second one doesn't work with alsa and jack. But since both my emu10k1 and my onboard-sound have a 5+1 output (3 stereo-outs each) I didn't invest more as I have only one pair of speakers. ;-) Arnold -- There is a theory which states that if ever anyone discovers exactly what the Universe is for and why it is here, it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another theory which states that this has already happened. -- Douglas Adams, The Restaurant at the End of the Universe -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 190 bytes Desc: not available Url : http://music.columbia.edu/pipermail/linux-audio-user/attachments/20050515/d9e65e72/attachment.bin
