audiofix.sh

#!/bin/sh

SAS='/opt/brew/bin/SwitchAudioSource'

DOCK='CalDigit Thunderbolt 3 Audio'
EXT_MIC='External Microphone'
EXT_PHONES='External Headphones'
HEADSET='WH-1000XM3'
MAC_MIC='MacBook Pro Microphone'
MAC_SPEAKERS='MacBook Pro Speakers'

set -e

has_device() {
	$SAS -t all -a | grep -q "$1"
}

set_input() {
	$SAS -t input -s "$1"
}

set_output() {
	$SAS -t output -s "$1"
	set_system "$1"
}

set_system() {
	$SAS -t system -s "$1"
}

if has_device "$DOCK"; then
	set_input "$DOCK"
	set_output "$DOCK"
elif has_device "$HEADSET" && has_device "$EXT_MIC"; then
	set_input "$EXT_MIC"
	set_output "$HEADSET"
else
	input=`$SAS -t input -c`
	output=`$SAS -t output -c`

	if [ "$input" = "$HEADSET" ]; then
		set_input "$MAC_MIC"
	fi

	if [ "$output" = "$EXT_PHONES" ]; then
		set_output "$MAC_SPEAKERS"
	else
		set_system "$output"
	fi
fi