On Thu, 2012-03-08 at 20:09 -0800, Laxmikant Rashinkar wrote: > Hi Tanu, > > thanks, appreciate your explanation of sinks and sources. > > 1) I'm presuming that I cannot use the Simple API for stereo mixing; > only the Async API should be used? If you want the application to automatically select the right source to record from (as opposed to requiring the user to manually give the source name), then yes, you need the async API, because the simple API doesn't provide a mechanism to query the available sources. You can do the recording part with the simple API if you want. > 2) is there any app (e.g gnome-sound-recorder) that uses PA for > recording sound? I can look at the source and learn. I don't know about gnome-sound-recorder specifically. My guess would be that it uses GStreamer, but that's just a guess, so you might want to check out its source anyway. But at least the pacat, parec and paplay utilities that come with Pulseaudio use the Pulseaudio async API directly, so maybe they can be used as an example (those utilities are actually the same program, and they are implemented in the same source file: src/utils/pacat.c). PS. Please avoid HTML messages (use plain text instead) and top posting on mailing lists. For a more detailed explanation, see for example the Posting Style section on this MythTV wiki page: http://www.mythtv.org/wiki/Mailing_List_etiquette#Posting_Style -- Tanu
