Watch the super-talented singer, Evilena Protektore, and the EHX Voice Box in action. The EHX Voice Box Harmony Machine and Vocoder is a multi-function vocal synth processor in a compact pedal. Evilena is a renowned Latvian jazz vocalist, composer and band leader. She composed the original tune she sings in this video especially for her demo. $261.20Add to cart MORE DETAILS Evelina also did a very comprehensive review of the Voice Box’s features and functions, kind of like a video owner’s manual.