Apple - Touch bar volume controls don't work

Seems to be a bug that shows if you plug an external display, etc.

Open Terminal.app and type:

killall ControlStrip

The problem is the MAC thinks the external monitors have a speaker when they don't.

Goto System Preferences -> Sound -> Check "Show Volume in the menu bar".

Then from the Volume Bar in the menu bar change the "Output" back to "MacBook Pro Speakers"

For anyone who might have the same problem, it seems to be a weird bug on High Sierra at least.

When the "slow keys" are enabled (system preferences -> accesibility -> keyboard) the volume controls (maybe other control keys too?) on the touchbar do not work.