Chromium and Chrome refus to list or capture monitor devices on Linux
- Issue 931749: DOMException: could not start audio source when trying to access audioinput
- Issue 1155954: Add --allow-monitor-inputs flag
- Issue 865799 in chromium: A way for enumerateDevices() to show audiooutput devices with labels when user has no cam or mic
Virtual microphone using GStreamer and PulseAudio includes a section that describes a workaround using PulseAudio to create a virtual microphone where the source is a monitor device