I just created a macro to change the sound output. I got really tired of all the clicks, so I edited an applescript that I found somewhere (here maybe).
Few quirks: I didn't want to use the prompt user for input --> list feature since KM/apple doesn't allow the user to scroll through the list with the keys, so I ended up displaying the options in a separate window. Not the greatest solution, I know.
You'll need to fill in the various sound options yourself.
toggle Sound v3.kmmacros (5.5 KB)