Hi Am currently using Audioscience cards with pjsip , with 8 incoming and 8 outgoing, works like a beauty. I wouldn't recommend those USB sound cards, had terrible nightmares with them. Anyway they still might work so just my own 2 cents. Sounds like you are using OSS (it uses /dev/dsp*) , you need to install ALSA and configure it properly, pjsip which uses portaudio requires ALSA if im not mistaken and wont work with OSS. You can then assign input/output ports in the pjsip configuration files. There is a command line utility in the samples directory called sndinfo-i686-pc-linux-gnu which you can use to identify which channels of your sound card are accessible by pjsip etc. If you install the cards with ALSA , you can type aplay -l (L) or aplay -L to list the devices/sound cards that are connected. They will be something like card0 , card1 , card2 etc. Once this is done correctly , you can configure/install pjsip and then use the sndinfo to get the id of each card, configure them in the pjsip.conf and it should work Regards _____ From: pjsip-bounces@xxxxxxxxxxxxxxx [mailto:pjsip-bounces at lists.pjsip.org] On Behalf Of Jeffrey Ross Sent: Tuesday, March 23, 2010 12:34 PM To: pjsip at lists.pjsip.org Subject: Multiple sound cards and pjsip I wish to receive 10 mono voice channels connected directly into a remote machine and have them sent via pjsip to my local machine. The local machine will send one voice channel back to the remote machine. At present I'm investigating if I can get 10 USB sound cards to work in Linux and to do so reliably. For testing I plan to modify pjsua to specify a list of device names to be opened, eg /dev/dsp0, .. /dev/dsp9. It looks like pjsua tries to open /dev/dsp (although I can't see where it picks up that device name from). Has anyone succeeded in getting multiple sound cards to work with pjsip? Any hints? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20100323/db4088eb/attachment.html>