Howdy all! I've been moving between OSes trying to get a solution going. We stream a large number of low-bitrate feeds via darkice to an icecast server (For fun) of public safety type stuff. I'm trying to up the density on the systems that feed the stuff since computing power is so fast. I've got a system with 7 Creative / Ensoniq ES1371 cards in it. I need to hit each card twice. My goal is to have two copies of darkice per card, one encoding the left feed and one into the right feed to different streams. The inputs are scanners (lots of them), so stereo isn't needed and one channel is wasted per card. I had custom hacked darkice so that I had two copies, one broken in that it only does left, one for right. This worked on FreeBSD (multiple copies could open /dev/dsp for read without issue oddly enough) but other problems have me trying to use Debian. I noticed alsa can re-do the channels, so I decided to try this so I do not need a modified darkice version. (Note, in my modified version I've got the app set to leave the card in stereo so that both channels stay active, then when it goes to encode I pass Lame the mono flag, and the stream the mono flag so that it fits my solution. Not pretty but it works (other BSD issue causes it to crash every 7 hours though :-) I've got Alsa installed, the cards all show up. I created a .asoundrc file that contains 7 sets of entries that look like this: ----------------------+ pcm.record_left { type dsnoop ipc_key 234884 slave { pcm "hw:0,0" channels 2 } bindings.0 0 } pcm.record_right { type dsnoop ipc_key 2241234 slave { pcm "hw:0,0" channels 2 } bindings.0 1 } ------------------+ Then I have a darkice config for each pcm device. They increment the hw:0,0 up to hw:6,0. The ipc_keys are all different. The pcm.record_ part increments as well so there are no dupes. One darkice per entry in the asoundrc. When I try to launch two copies of darkice, it fails with this: ALSA lib pcm_dsnoop.c:558:(snd_pcm_dsnoop_open) unable to open slave It looks as if only one slave can open the hw: device at a time. This kind of defeats what I'm after? I thought the point of the dsnoop was to allow multiple apps to read one physical hardware device? The odd thing is SOMETIMES it works! Sometimes I will wind up with two copies running against 1 sound card. (While the app is running there are Buffer overrun's scrolling down the screen, but I can address that later, perhaps by matching up sampling rates between ALSA and darkice). -----+ audio20:/proc/asound/card0/pcm0c# cat info card: 0 device: 0 subdevice: 0 stream: CAPTURE id: ES1371/1 name: ES1371 DAC2/ADC subname: subdevice #0 class: 0 subclass: 0 subdevices_count: 1 subdevices_avail: 0 -----+ Sound cards only have one subdevice for capture from what I can tell. Thoughts? What am I missing? ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user