Eventide is a US based company that makes a range of broadcasting and recording equipment and began making cutting edge products in 1971 in a New York basement. Artist favourites include the H910, Harmonizer, Instant Phaser, plus stompboxes and plugins. Notable Eventide users are Tony Visconti, Eddie Van Halen and Todd Rundgren

Eventide PitchFactor Kit

Multi-voice Pitch shifting and harmonizing stompbox