My question here is rather simple. How does one create a purely virtual audio device in ALSA that would be capable of:

  1. being used as an audio output destination,

  2. being used as an audio input source, outputting whatever has been sent to it.

What I'm essentially trying to achieve is outputting sound to this device, and using that device as a mic in another application (like Skype, for example), which allows me to play sounds and music in skype or whatever else that would be.

Information on this is really obscure, and search results show mostly irrelevant things, like splitting device outputs or something like that. I really have no idea where and what to look for now, so any help would be incredibly appreciated.

  • 12
    just load snd-aloop
    – CL.
    Mar 8, 2013 at 10:31
  • 1
    Thanks, that's exactly what I wanted - though it took me some time to figure it out properly. Mar 8, 2013 at 12:21
  • 2
    @CL. You should post your comment as an answer, thus marking the question as solved. Thank you!
    – Shadok
    Mar 25, 2013 at 14:31

1 Answer 1


To load the loopback module:

$ modprobe snd-aloop
  • 1
    The reason for the error: "Body must be at least 30 characters...". The error is above and to the right side in my browser.
    – BenjiWiebe
    Jun 16, 2013 at 1:17
  • $ modprobe snd-aloop # for newbs UI: ...Looks like they fixed it :-)
    – Dagelf
    Apr 12, 2017 at 13:22

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