Set Sound Output

Speakers.scpt

-- Set sound output, adapted from https://discussions.apple.com/message/20676485
--
-- Run as:
--   osascript Speakers.scpt                -- Default to "Internal Speakers"
--   osascript Speakers.scpt "DELL P2715Q"  -- Anything listed in System Preferences,
--                                          --   e.g. Monitor connected via HDMI
on run argv
	set asrc to "Internal Speakers"
	if (count of argv) > 0 then
		set asrc to item 1 of argv
	end if
	
	tell application "System Preferences"
		reveal anchor "output" of pane id "com.apple.preference.sound"
		
		tell application "System Events"
			tell process "System Preferences"
				select (row 1 of table 1 of scroll area 1 of tab group 1 of window "Sound" whose value of text field 1 is asrc)
			end tell
		end tell
		
		quit
	end tell
end run