Action that lets you switch Input and Output Audio devices. Requires switchaudio-osx which is most easily installed via homebrew
brew install switchaudio-osx (command must be installed to
When invoked it returns items for each output device (headphones) and each input device (microphone). The currently selected item for each is prefixed with *. Select an item and hit enter to switch to that item, the action will respond by refreshing the items and you should note the * by the item you just selected.
Supports Action Updates framework and action