Assuming you're talking about Bluetooth mics: If you're using pipewire-media-session (for example, if you're on NixOS 21.11 instead of NixOS unstable), then pro

Assuming you're talking about Bluetooth mics: If you're using pipewire-media-session (for example, if you're on NixOS 21.11 instead of NixOS unstable), then profile autoswitching [0] is disabled by default, so you have to use pavucontrol to switch from A2DP to HSP. Profile autoswitching is enabled by default in WirePlumber, which is the default session manager in NixOS unstable as of a few days ago. [0] https://wiki.archlinux.org/title/PipeWire#Automatic_profile_selection https://wiki.archlinux.org/title/PipeWire#Automatic_profile_...