How to hear my voice in speakers with a mic?

  • I have a USB microphone that I can chat on Skype, record sound etc. But how can I make it so that when my mic is on and I speak, Ι hear it in speakers live without having to record my voice first and then play it back? What apps do I need or where can I enable this option?

    I'm running Ubuntu 10.10

    One thing to consider is that depending on your soundcard you might get latency (a slight delay between your speaking and the sound coming through your headphones). This is very disconcerting and is due to the processing and converting from Analog to Digital then back to Analog. I have heard that in Ubuntu you might need to install Jack audio libraries to reduce latency.

    ok, but how do I get the sound coming out in first place?

    You don't need jack. I use the lowlatency kernel from Ubuntustudio that is also available through apt-get with no issues.

    Try this command: `arecord | aplay`

  • Here is a solution that I've tested with Pulse Audio on Ubuntu 12.04.

    • Install PulseAudio Volume Control (pavucontrol):

      sudo apt install pavucontrol
    • Now we will route your microphone to your speakers. Do this by running the following command:

      pactl load-module module-loopback latency_msec=1
    • On the Recording tab of pavucontrol, you can show all streams (combobox at the bottom) and then configure which microphone (if you have more than one) should loopback into the built-in analog stereo

    To stop it running, run:

    pactl unload-module module-loopback

    The solution works fine, but how can I undo this setting?

    To undo it see this answer.

    When I do this sound comes out of the speakers, but it is only static, and no voice if I speak into the mic. Any ideas? I'm on 14.04

    delay ruins playback.. try to sing with it :\

    You can also logout and login to undo this.

    Or, instead of logging out: `pactl unload-module module-loopback`

    It still gives a slightly noticeable lag, which is annoying when playing instruments. Any way to avoid it?

    This solution does not work on Ubuntu Budgie 18.04 (kernel 4.20.17) on Dell Inspiron 7720

    @DanielVartanov: To reduce latency significantly, use a realtime-enabled kernel and configure pulseaudio to run with realtime priority and a lower `nice` value (I have `nice-level = -19`, `realtime-scheduling = yes` and `realtime-priority = 97`, as well as `rlimit-nice = 39` and `rlimit-rtprio = 98`, in `/etc/default/`). For that to work you'll also need to configure limits (in `/etc/systemd/system.conf.d/limits.conf`). I have `DefaultLimitNICE=-19` and `DefaultLimitRTPRIO=98` for the `realtime` group (of which I'm a user). It works great.

    Oh, it also makes sense to load `module-loopback` with `latency_msec=20` so as to not result in too many dropped sources and auto-increasing the latency (it can be monitored with `journalctl --user-unit pulseaudio -n 1000 -f`).

  • Simple solution

    Just use:

    arecord -f cd - | aplay -

    If you wanna play while saving:

    arecord -f cd - | tee output.wav | aplay -

    Definitely, the most simple way to echo microphone into headphones. I miss a GUI interface.

    With this solution the playback has an awful latency, unfortunately

    This will help with the latency: `arecord --buffer-time=1 - | aplay --buffer-time=1 -`

    Great way to record media! You can listen to it too so it's less painfully slow! Question though, how would I handle this if I have multiple mics connected (how can I select one over the other)?

    a buffer time of 1ms _will_ result in underruns. I recommend at least 20ms - make it 40ms if not using a realtime kernel.

    1ms resulted in lower format, this worked for me to force specific format and sampling rate: `arecord -r 192000 -f s16_le --buffer-time=1 - | aplay --buffer-time=1 -`

    1. First install PulseAudio Volume Control/pavucontrol.

      Either install via Software Manager.

      Or run this below command in terminal:

      sudo apt-get install pavucontrol
    2. To start Mic to Speaker working, run below command in terminal.

      pactl load-module module-loopback latency_msec=1
    3. To stop the same, run below command in terminal.

      pactl unload-module $(pactl list short modules | awk '$2 =="module-loopback" { print $1 }' - )

    This solution does not work on Ubuntu Budgie 18.04 (kernel 4.20.17) on Dell Inspiron 7720

    This (module-loopback) doesn't seem to work with a Focusrite Scarlett 4i4. For some reason it randomly disconnects after a second or two. module-loopback works with the built-in mic though. And the Scarlett is not broken, I can record fine in Audacity :/.

  • You can do it with jackd and qjackctl.

    The program jackd is an audio sound server daemon for Linux, and its counterpart qjackctl is a simple user interface that let you handle JACK audio server. From this you can virtually connect the output of your mic to your speakers.

    You can install them from you terminal with:

    sudo apt-get install jackd qjackctl

    After installing it, and running qjackctl the connections mentioned will looks like the following screenshot.

    qjackctl app in action

    Note, I am a professional audio editor, I and use it each week recordings sesions.


    what do I do if there's nothing under connections there.... I don't have that system - capture - playback thing.... there's nothing there....

    I think it's not working because i have a usb mic...

    Strange... when you started `qjackctl`, dit it started without complaining?

    @MartinZeltin: For me it was because the jack server wasn't started. Click the 'Messages' button and look for that error in the log. To fix this I opened 'Setup' and then went to the 'Misc' tab and ticked 'Start JACK audio server on application startup'. I then closed qjackctl and reopened it. After that I could see exactly what was in the picture above

  • I've packaged up other people's answers into 'listen', a Bash script. Run this to listen to your mic input. It sleeps forever. Kill it (e.g. Ctrl-C) to stop listening.

    #!/usr/bin/env bash
    # Directs audio input (e.g. mic) to audio output (e.g. speakers),
    # then sleeps forever. Stops audio redirection when it is killed.
    # So, for example, plug your phone into the PC's mic, run 'listen',
    # and listen to phone audio through your computer's speakers.
    # Requires:
    # sudo apt-get install pactl
    set -e
    module=$(pactl load-module module-loopback latency_msec=10)
    function cleanup {
        pactl unload-module $module
    trap cleanup EXIT
    sleep infinity
  • Just an update for 2018 if you use gnome. There's a gnome extension that you can use to achieve just that. Here is the link in case anyone wants to try it out

    Could you elaborate a little bit how to install that and how it should work? I think I have installed the extension properly (using Firefox Gnome Shell extension plugin), but nothing happened and I have no idea how to enable/configure it.

    Once you install it, it should make a tray icon appear. Clicking that icon should enable the mic loop. If the tray icon isn't displaying you probably need to install something like TopIcon Plus and that will probably make it appear. I'm sorry I can't be more specific but had to switch to windows and it's been a while since I used linux as a main system.

  • You can use audacity to amplify your voice by "playback while recording" feature. go to edit>preferences>recording> check software playthrough.

    I'm not sure that an audio recording software is the right solution to echo the microphone input to the speakers.

  • Mixxx is awesome! I'm using it on Ubuntu (Budgie) 18.04. Quick setup, just turn it on, set up your hardware (I only had to set up the input device) and turn on the mic. You're up and running in no time with no latency, plus the ability to do tons more if you want. I dowloaded it from the software store.

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Content dated before 6/26/2020 9:53 AM