In 1967, Ellis began experimentation with electronics. His pianist started using the Fender-Rhodes electric piano, clavinet, and electric harpsichord. Ellis himself started using what he called the "electrophonic trumpet"; that is, a trumpet whose sound was amplified and often routed through various effects processors. The first appearance of this innovation is on "Open Beauty" from 1967's "Electric Bath", in which Ellis takes an extended solo with his trumpet being processed through an echoplex. Ellis also used the ring modulator on several occasions, which was built for him by Tom Oberheim.