See below some recommendations for use of effect pedals with the theremin Thereminworld recommends http://www.thereminworld.com/recommended-effects Carolina Eyck uses the PS-6 Harmonist, DD-7 Digital Delay, and RC-50 Loop Station by Boss and the Hummingbird Tremolo by Earthquaker Devices, and she also works with Ableton Live effect plug-ins. Carolina Eyck - Theremin - OceanWatch this video on...Read More