Moog Etherwave Plus Theremin The Etherwave Plus has all the great features and tone of our standard Etherwave theremin Pitch &amp; Volume CV Outputs - control a different CV parameter with each hand Gate Output - trigger envelopes and other events The Plus makes it an ideal controller and performance instrument Pitch Preview/Headphone Output - with volume control, lets you hear your note before the audience does. Power LED - instant visual power status on dark stages