Script to cycle through MacOS audio input/outputs with SwitchAudioSource, with configurable excluded devices

switch-audio

#!/usr/bin/env python3
import subprocess
import json
import sys

# Function to execute a command and return its output
def execute_command(command):
    result = subprocess.run(command, stdout=subprocess.PIPE, shell=True)
    return result.stdout.decode('utf-8')

# Function to switch to the next audio source
def switch_audio_source(device_type):
    # List of devices to exclude categorized by type
    excluded_devices = {
        "input": ['USB Audio CODEC'],
        "output": [],
        "both": ['ZoomAudioDevice', 'DELL U2711']
    }

    # Get all audio sources
    all_sources_output = execute_command(f'SwitchAudioSource -a -f json -t {device_type}')
    all_sources = [json.loads(line) for line in all_sources_output.strip().split('\n')]

    # Filter to exclude certain devices
    relevant_sources = [
        src for src in all_sources
        if src['name'].strip() not in excluded_devices.get(device_type, []) and
        src['name'].strip() not in excluded_devices.get("both", [])
    ]

    if not relevant_sources:
        print("No relevant audio sources found.")
        return

    # Get current audio source
    current_source_output = execute_command(f'SwitchAudioSource -c -f json -t {device_type}')
    current_source = json.loads(current_source_output)

    # Find the next source in the list
    current_index = next((i for i, src in enumerate(relevant_sources) if src['id'] == current_source['id']), -1)
    next_index = (current_index + 1) % len(relevant_sources)
    next_source = relevant_sources[next_index]

    # Switch to the next source
    execute_command(f'SwitchAudioSource -i {next_source["id"]} -t {device_type}')
    print(f"Switched to {next_source['name']}")

# Main function
if __name__ == "__main__":
    if len(sys.argv) != 2 or sys.argv[1] not in ['input', 'output']:
        print("Usage: switch-audio [input/output]")
    else:
        switch_audio_source(sys.argv[1])