PulseAudio is the built-in audio system in ubuntu. As a result of the quick tutorial, you are able to combine and fork audio stream on your computer.

Setup streams PulseAudio

You may want to plug your headset first.

# Outputs
pacmd list-sinks

# Inputs
pacmd list-sources

We create the „recording“ bubble from above.

pacmd load-module module-null-sink sink_name=recording sink_properties=device.description=recording

A loopback device for connecting inputs to recording. The latency is important to avoid delays.

pacmd load-module module-loopback latency_msec=1 sink=recording sink_dont_move=true

The combining bubble. To figure the name of your headset, call the list-commands mentioned above. My headset is from Logitech.

pacmd load-module module-combine-sink sink_name=combined sink_properties=device.description=combined slaves=recording,alsa_output.usb-Logitech_Logitech_USB_Headset_000000000000-00.analog-stereo

You are all set. Install PulseAudio Volume Control. This is additionally needed to ubuntu’s sound settings.

sudo apt install pavucontrol
PulseAudio Volume Control settings for Playback
PulseAudio Volume Control settings for Playback
PulseAudio Volume Control settings for Recording
PulseAudio Volume Control settings for Recording

Lavf… is ffmpeg capturing my screen, adding a logo to it, and recording the related audio stream. All at once. Also, my voice, and the voices of all attendees of a video call get recorded, while not hearing myself during the online session.

In ubuntu’s sound settings, my headset listens to the headset’s default „Headphones – 960“. You probably want to check that.

All recordings are done? Unload all modules.

pacmd list-modules
pacmd unload-module <number of the module>

Learn more about screen recording with ffmpeg.

Learn more about video editing: Video Bearbeitung mit Linux und Blender, Videos bearbeiten mit Linux.