[pulseaudio-discuss] Virtual loopback to provide PCM capture

[Colin Guthrie]

'Twas brillig, and Davide Cescato at 28/06/09 22:45 did gyre and gimble:
> Hello,
> 
> thanks for the work on PulseAudio! I would like to ask a question, and 
> will try to be as precise as I my limited knowledge allows.
> 
> I would like to capture the audio on the PCM channel, i.e., the mixed 
> sound stream that is sent to my notebook's speakers. I have read in 
> forums that Windows Vista achieves the behaviour I am aiming at by 
> offering a virtual audio channel called "what you hear" among the list 
> of capture sources.

Yeah pulse does this automatically. Every output device (or sink) has a 
"monitor" source.

Sources are just pulses way of saying "input device", so recording from 
the mic or line in or a "monitor source" is exactly the same.

So if your app is implementing direct pulse support, you can easily 
record from these montitor sources. You can see the sources in 
pavucontrol under the "Input Devices" tab provided you pick the right 
drop down.

Col


-- 

Colin Guthrie
gmane(at)colin.guthr.ie
http://colin.guthr.ie/

Day Job:
   Tribalogic Limited [http://www.tribalogic.net/]
Open Source:
   Mandriva Linux Contributor [http://www.mandriva.com/]
   PulseAudio Hacker [http://www.pulseaudio.org/]
   Trac Hacker [http://trac.edgewall.org/]