Apple - Any way to change sound output device via Applescript or shell?

There's switchaudio-osx, command which needs to be compiled from sources or can be installed via homebrew (Xcode installation required):

brew install switchaudio-osx

Usage:

SwitchAudioSource [-a] [-c] [-t type] [-n] -s device_name

• -a : shows all devices
• -c : shows current device
• -t type : device type (input/output/system). Defaults to output.
• -n : cycles the audio device to the next one
• -s device_name : sets the audio device to the given device by name

There's audiodevice command available from whoshacks.

Usage:

• audiodevice list devices for input, output, and system audio
• audiodevice <port> display the audio device for the selected port
• audiodevice <port> list list available audio devices for the selected port
• audiodevice <port> <device> set the selected port to use the designated device ("internal" will select Internal Speakers or Headphones, whichever is active)