How to remove EPSON Projector Audio driver?

Go to /Library/Extensions and delete the "EPSONProjectorAudio.kext" kernel extension. The pesky EPSON Projector Audio driver should be gone after reboot.

(If you can't see the Library folder on your hard drive, try Finder > Go > Go to folder… and paste /Library/Extensions)

Had the same problem, note that the folder name is actually EMP_UDAU.kext. Once you delete this folder and reboot your Mac, the EPSON projector audio option is gone from the system.

Also to remove the toolbar app, search for "usb display uninstaller" in Spotlight. Start the app and confirm uninstall (you will be asked to restart the computer).