Bash script to switch between desired audio output options. Currently bound to "Page Down" key personally, using Karabiner.

audio-switch-next.sh

#!/bin/bash

# Path to SwitchAudioSource
SWITCH_AUDIO="/opt/homebrew/bin/SwitchAudioSource"

# Get current output device
current=$("$SWITCH_AUDIO" -c)

# Define preferred devices in order
declare -a devices=(
    "MacBook Pro Speakers"
    "External Headphones"
    "EDIFIER R1700BT"
    "airpods"
)

# Function to check if a device is available
is_device_available() {
    local device="$1"
    "$SWITCH_AUDIO" -a | grep -q "$device"
    return $?
}

# Find next available device
find_next_device() {
    local current="$1"
    local found=0
    local next=""
    
    # Loop through devices array
    for device in "${devices[@]}"; do
        # If device is available
        if is_device_available "$device"; then
            # If we found current device before, this is our next
            if [[ $found -eq 1 ]]; then
                next="$device"
                break
            fi
            # If this is our current device, mark it
            if [[ "$current" == *"$device"* ]]; then
                found=1
            fi
        fi
    done
    
    # If we haven't found next device, use first available device
    if [[ -z "$next" ]]; then
        for device in "${devices[@]}"; do
            if is_device_available "$device"; then
                next="$device"
                break
            fi
        done
    fi
    
    echo "$next"
}

# Find and switch to next device
next_device=$(find_next_device "$current")
if [[ -n "$next_device" ]]; then
    "$SWITCH_AUDIO" -s "$next_device"
    osascript -e "display notification \"$next_device\" with title \"Audio Output\""
fi