The McGurk effect is an illusion where if a listener hears 'ba' but sees lips saying 'ga' the listener will perceive the sound as 'da'. It is a powerful illusion that does not break down even when the listener is aware of it. While McGurk's study was confined to speech, I wonder if all the graphic information we are processing when mixing music on a DAW is not having some effects on our aural perception. Or maybe the visuals provide overload and simply distract us from listening at our best. Maybe I'll do a thesis on this one day.