2009/6/28 Andreas Herrmann <andreasherrmann at student.ethz.ch>: > The software and the symptoms: > I'm running Ubuntu Linux 8.04 (Hardy) with pulseaudio, of course ;). > XawTV is my television application of choice. > The Audigy is configured as default sink and works for music, system > beeps and so on, but not for television. > If I plug headphones to the on-board speaker-jack I can hear the > television sound coming out of the headphones, while XawTV is running. > How ever if I look at the > PulseAudio_Manager->Devices->Properties->Volume_Meter window the only > device that 'shows' some sound-output is the Audigy (music), but the > on-board sink and every source listed pretends to be quiet, even if I > can hear the TV sound with the headphones. The on-board sound card driver is looping input directly to output, so the audio doesn't pass through PA. > Finally. My question: > How do I make pulseaudio to pass the tv-sound to the Audigy, such that I > can hear the television sound with the speakers connected to the > sound-card? You have to copy (record and play back) the on-board line-in to Audigy. It would make most sense to do this completely inside PA, but unfortunately it's not supported. A crappy (really) solution is to record the input with parec and pipe the audio to pacat. The command would look something like this: $ parec -d <on-board source> | pacat -d <audigy sink> Another solution might be to use RTP. That's a kludge too, but might perform better if it compensates for the clock drift between the on-board card and Audigy. If someone can confirm this, I'd be interested. You put these two lines to default.pa: load-module module-rtp-send source=<on-board source> loop=true load-module module-rtp-recv sink=<audigy sink> That sends the audio to the network too. If that's a problem, I would guess (no personal experience) you can avoid that by giving a third parameter to module-rtp-send: destination=127.0.0.1. Maybe you will then need to give sap_address=127.0.0.1 to module-rtp-recv too? And if the stream is targeted to localhost, maybe the loop parameter is unnecessary? -- Tanu Kaskinen
