[Karabiner-Elements] F24 to cycles the audio device to the next one.

f24.json

{
  "title": "F24 mapping",
  "rules": [
    {
      "manipulators": [
        {
          "description": "Cycles the audio device to the next one.",
          "from": {
            "key_code": "f24"
          },
          "to": [
            {
              "shell_command": "/opt/homebrew/bin/SwitchAudioSource -n"
            }
          ],
          "type": "basic"
        }
      ]
    }
  ]
}

Reference

https://github.com/deweller/switchaudio-osx