Set up bluetooth headphones with Qubes OS

bluetooth-audio.sh

#!/bin/bash

# original source from https://m7i.org/tips/qubes-VM-bluetooth-audio/
# fixed calls to qvm-usb and replaced bluetooth-assistant with bluetoothctl (see https://github.com/blueman-project/blueman/issues/1560)

# remember preparing AppVM template: sudo apt-get install qubes-usb-proxy bluez blueman pulseaudio-module-bluetooth pavucontrol

set -o errexit
set -o nounset
 
# Customize the following value by the USB device ID (look in qvm-usb --list)
export usb_device="Broadcom_Corp_BCM20702A0_5CF370995B89";
# Customize the following value with the bluetooth headphones' MAC address
export headphones="9C:19:C2:FC:AD:5F" # Aukey BT headset
# export headphones="9C:19:C2:9B:BA:27" # Xoaomi BT headset
 
if [ $# -ne 1 ]; then
        echo -en "Usage: bluetooth-audio VM-name\n\tStarts the bluetooth audio for the VM specified\n" >&2
        exit 1
else
    	export VM="$1";

    # Looks for the USB device
    qvm-usb list | grep -F "$usb_device" >/dev/null || {
        echo "Error: device $usb_device is not connected." >&2
        exit 1;
    }
 
    # Checks if the device is already connected to the target VM
    if qvm-usb list | grep -F "$usb_device" | grep -F "   $VM" >/dev/null; then
        echo "Device $usb_device is already connected to $VM, not doing anything."
        exit 1;
    else
        # Finds the sys-usb's assigned name for the USB device
        assignment="$(qvm-usb list | grep "$usb_device" | awk '{ print $1; }')";
 
        echo "Connecting $assignment to $VM...";
        qvm-usb attach "$VM" "$assignment" || {
            echo "Could not attach the device $usb_device to $VM." >&2
            exit 1;
        }
    fi;
 
    echo "Reconfiguring pulseaudio for bluetooth audio in $VM..."
        qvm-run "$VM" -- "killall pulseaudio"
        qvm-run "$VM" -- "pulseaudio --start"
        qvm-run "$VM" -- "bluetoothctl connect ${headphones}"
        qvm-run "$VM" -- "pavucontrol"
fi;