The album was among the earliest to make use of the Moog synthesizer, which Dolenz introduced to the group and played in the studio; he owned one of the first twenty ever sold. Along with the Doors' September 1967 album "Strange Days", "Their Satanic Majesties Request" by the Rolling Stones in December, and the Byrds' January 1968 album "The Notorious Byrd Brothers", "Pisces" was one of the first commercial recordings featuring the Moog to reach a wide audience. Dolenz plays the synthesizer on "Daily Nightly", while electronic musician Paul Beaver plays the Moog on "Star Collector".