Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

How can I route line in to speakers, loopback-style with alsa? I've seen a few solutions using GUIs but I don't have a desktop UI installed. I've also seen a solution with PulseAudio, but I'd prefer not to have to install more packages and deal with extra configuration.

Is it possible to do this strictly with alsa? Sorry, I'm new to alsa and sound devices in general.

share|improve this question
up vote 1 down vote accepted

Use the alsamixer program, unmuting and adjusting the setting for your Line connection in the Playback section. It should allow you to do that through its terminal interface. To save the settings so that they remain the same after a reboot, you need to run alsactl store as root after you make your changes.

share|improve this answer
Ah, this worked. It was mic that had the volume though, not line. Thanks! – kevmo314 Nov 23 '11 at 19:13

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.