• https://wiki.archlinux.org/title/Bluetooth_headset

Package	Arch Linux
Daemons for the bluetooth protocol stack	bluez
Tools to manage Bluetooth devices for Linux	bluez-tools
Bluetooth support for PulseAudio	pulseaudio-bluetooth

Add and trust device:

1. power on controller
2. Set agent on and default-agent
3. To find devices scan on
4. pair aa:bb:cc:dd:ee:ff
   • List paired-devices pair
   • To delete a paired device remove aa:bb:cc:dd:ee:ff
5. trust aa:bb:cc:dd:ee:ff to enable automatically re-connect
   • untrust aa:bb:cc:dd:ee:ff
6. Edit /etc/pulse/default.pa Add ### Automatically switch to newly-connected devices Add load-module module-switch-on-connect
7. scan off

Event	Error	Cause	Consequence	Remedy
Connect device	Failed to connect: org.bluez.Error.NotReady br-connection-adapter-not-powered	Controller is not powered on.	power on
Connect device	Failed to connect: org.bluez.Error.Failed br-connection-profile-unavailable	Pulseaudio is not started.	systemctl start --user pulseaudio
Connect device	Failed to connect: org.bluez.Error.Failed br-connection-unknown	unknown	Cannot connect to device	Remove device, and pair it again.

• Answer by Chris_128 to question A2DP on PulseAudio - terrible choppy/skipping audio

1. Identify device and the port:
   • pactl list | grep -Pzo '.*bluez_card(.*\n)*'
   • headset-output: Headset (type: Headset, priority: 0, latency offset: 0 usec, available) Part of profile(s): a2dp_sink, handsfree_head_unit
2. Define a new value for latency:
   • pactl set-port-latency-offset <NAME> <PORT> <BUFFER_SIZE_MICROSECONDS>
   • For example: pactl set-port-latency-offset bluez_card.A1_B2_C3_D4_E5_F6 headset-output 100000
3. Restart bluetooth. For example systemctl restart bluetooth