(Oops. Forgot to reply to the list as well...) I'm definitely not an ALSA expert, but I believe there's supposed to be a way to do what you're asking. There's a kernel module called snd_aloop that creates one or more artificial sound cards. You can play sound samples to it from one client and capture sound samples from it with another client. You can put options for the loopback sound cards in /etc/modprobe.conf or similar and then make sure to load the module when you boot (or later). In this case, you could pipe the output of your SDR program into aplay with appropriate options to set type (probably "-t raw"), set format, and direct the samples to the loopback card with something similar to "-D hw:2,0,0". Then, connect one (or IIUC, multiple) capture clients to something similar to "-D hw:2,1,0". Unfortunately, there appears to be a problem with at least some recent kernels. On about February 23, I posted a problem and question about behavior I notice on Mageia 2 where the loopback sound card allows its input (playback) stream to run significantly faster than the specified/accepted rate, and the output (capture) stream gets overruns. I have yet to hear an answer or other reply to that problem/question. I'm about to file a bug report about the problem. Fortunately for you, in your case, if your SDR sends at exactly the right rate, you might be okay once the buffers all find their pace and stride. HTH Robert > To: alsa-user@xxxxxxxxxxxxxxxxxxxxx > From: lists@xxxxxxxxxxxxxx > Date: Sat, 2 Mar 2013 01:52:50 +0000 > > Not exactly ALSA related, but I have software defined radio > program that feeds an audio stream to stdout. Can I make it > look like a /dev/dsp device so other programs can use it. That > is programs designed to read from soundcards? ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
