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I'm trying to screencast with both mic and system sounds at the same time. Previously this didn't work, but I have found that fiddling with the sound profile brings me a step closer.

To fiddle with sound profile:

  • Click on Sound menu
  • Select "Sound Preferences..."
  • Select "Hardware" tab
  • Choose the device to configure (I have two "Internal Audio" and "Logitech USB Headset")
  • Select option from Profile dropdown
  • Click "Test Speakers" to test output

So far so good. Previously I had Internal Audio set to "Analog Stereo Duplex" and the headset also on "Analog Stereo Duplex". When I recorded a screencast in Tibesti and played it back, I could hear myself but not the system sounds (for example, music player or Skype call).

I switched Internal Audio to "Digital Stereo Duplex (IEC958)". Under the "Output" tab I selected internal audio as the output. When I recorded a screencast in Tibesti and played it back, I could hear myself and the system sounds. Unfortunately, I couldn't hear the system sounds while recording, which means screencasting a Skype call couldn't work.

The internal audio profiles are: Analog Stereo Duplex, Analog Stereo Output, Digital Stereo (IEC958) Output + Analog Stereo Input, Digital Stereo Duplex (IEC958), Digital Stereo (HDMI) Output + Analog Stereo Input, Digital Stereo (HDMI) Output, Analog Stereo Input, Off.

The headset audio profiles are: Analog Stereo Duplex, Analog Stereo Output, Analog Stereo Input, Off.

Which profile combination and input/output selection will allow me to simultaneously hear and record system audio + microphone input?

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2 Answers 2

Reset to default
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+50

No sound profile selection will achieve the results you are looking for. Instead you could mix voice and audio channels (follow link for step-by-step details).

You might want start with this article from the same blog for background High quality audio broadcasting with Flipzu and Ubuntu Linux, or this "weekend project" for a lot more technical detail: Record From Skype Calls and Other Apps on Linux.

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2
  • Sadly, both of the links to flipzu are now broken.
    – user207998
    Mar 24, 2018 at 17:00
  • I just replaced the links by the ones in the wayback machine.
    – gpoo
    Mar 24, 2018 at 21:05
1

install & use pavucontrol

sudo apt-get install pavucontrol

executable : /usr/bin/pavucontrol

this software monitor audio output and can map audio input to monitors.

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  • thanks for the suggestion; so far pavucontrol looks simply like an alternative to sound preferences so I must be missing something - I get the same profile options under the "Configuration" tab, and it isn't obvious to me how to map the audio input, can you please explain how? thanks!
    – lofidevops
    Oct 15, 2011 at 6:20
  • ah, found blog.stebalien.com/2009/03/howto-ones-linux-computer-with.html and now I understand better
    – lofidevops
    Oct 15, 2011 at 6:40
  • 2
    so I've figured out how to use pavucontrol to record the output (monitor) rather than input, so I can hear the output and have it recorded at the same time, but now I can't record the input - I'd like to hear the output and record both output and input - do I need to pick a specific profile in the pavucontrol Configuration tab?
    – lofidevops
    Oct 15, 2011 at 6:56

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