On Saturday 14 May 2005 15:14, NiXO Beee wrote: 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&a…]ic#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