bluetooth headset

bluetooth headsets and linux don't like each other

So audio (in/out) Sony WH-1000MX3 and Intel® Dual Band Wireless-AC 8265 on aXPS13 running Arch Linux, how hard can it be?

bluez manages the bluetooth connection part, but will fail if it doesn't have access to the right profile

bluez: bluetooth
bluez-utils: actually control bluetooth
pulseaudio: do you really want to make your life harder by trying ALSA?
pulueaudio-bluetooth: make it talk with bluez
pulsemixer: (optional) ncurses interface to control pulseaudio, alternatively pamixer for pure cli, pavucontrol for gui

systemctl --user enable --now pulseaudio pulseaudio has socket activation, but it doesn't work if you try to connect to a bluetooth headset before something has started pulseaudio, so enable it to always make it available.
bluetoothctl power on turn on bluetooth (? or AutoEnable=true in /etc/bluetooth/main.conf but not sure how it interacts with pulseaudio being user service)
bluetoothctl agent on only needs to be done once
bluetoothctl scan on find bluetooth things in range, only needs to be done once
bluetoothctl pair xx:xx:xx:xx:xx:xx pair with device, only needs to be done once
bluetoothctl connect xx:xx:xx:xx:xx:xx connect to device
bluetoothctl trust xx:xx:xx:xx:xx:xx autoconnect to device on power on

Output: where sound goes, can set a default device
Input: mic control, Monitor of ... is to listen to what the mic picked up
Cards: sound profile control, A2DP for high quality output or HSP/HFP for tin can quality mic+output

+more pulseaudio modules