at Monterey. Inspired by his experiences with Latin bands, Ellis expanded his rhythm section to two drum sets, three double-basses, at least two auxiliary percussionists, piano, and organ. On the song "Turkish Bath" from Electric Bath (1967), bassist Ray Neapolitan doubles on sitar. His horn sections were often fairly typical, although he later added a tuba and French horn to augment the brass section, and sometimes had the saxophonists double on instruments like flute, oboe, clarinet and saxello. 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. In 1968, Ellis replaced his double bassists with a single electric bassist, at first Joe Julian, then Dennis Parker, and finally Dave McDaniel. He also hired guitarist Jay Graydon who remained with the band for several years. In 1971, for the Tears of Joy tour, Ellis added a string quartet to his band. The instruments were amplified using newly developed pick-ups made by Barcus-Berry so that they could be heard over the brass and saxophones. These new timbres offered Ellis a wellspring of creative possibilities. As he explained, "People spend whole evenings listening to a brass quintet, a woodwind or string quartet, so I reasoned that having ALL of these in the context of a big band should give us a fantastic variety of colors from which to draw." Sometime in 1973 or 1974, Haiku was released, which was recorded using a jazz quartet with full string orchestra backing. Due to the size of the group, this was probably never intended to be a replacement for the Don Ellis Orchestra as a touring group. Ellis's "Organic Band", which toured throughout spring and summer 1974, reduced the band's numbers from 21 or 22 to 15. The horn section was more than halved, the string quartet was removed, a vocal quartet was added, and no electronics (save for amplification) were used to alter the band's sound. After his heart attack, Ellis returned briefly to