The Varitone is an amplified

Instrument amplifier

An instrument amplifier is an electronic amplifier that converts the often barely audible or purely electronic signal from musical instruments such as an electric guitar, an electric bass, or an electric keyboard into an electronic signal capable of driving a loudspeaker that can be heard by the...

 saxophone

Saxophone

The saxophone is a conical-bore transposing musical instrument that is a member of the woodwind family. Saxophones are usually made of brass and played with a single-reed mouthpiece similar to that of the clarinet. The saxophone was invented by the Belgian instrument maker Adolphe Sax in 1846...

 that the Selmer Company

The Selmer Company

Henri Selmer Paris company is a French family-owned enterprise, manufacturer of musical instruments based in Paris, France in 1885. It is known for its high-quality woodwind and brass instruments, especially saxophones, clarinets and trumpets...

 introduced in 1965. The Varitone included a small microphone

Microphone

A microphone is an acoustic-to-electric transducer or sensor that converts sound into an electrical signal. In 1877, Emile Berliner invented the first microphone used as a telephone voice transmitter...

 mounted on the saxophone neck, a set of controls attached to the saxophone's body, and an amplifier and loudspeaker

Loudspeaker

A loudspeaker is an electroacoustic transducer that produces sound in response to an electrical audio signal input. Non-electrical loudspeakers were developed as accessories to telephone systems, but electronic amplification by vacuum tube made loudspeakers more generally useful...

 mounted inside a cabinet. The Varitone's effect

Effects unit

Effects units are electronic devices that alter how a musical instrument or other audio source sounds. Some effects subtly "color" a sound, while others transform it dramatically. Effects are used during live performances or in the studio, typically with electric guitar, keyboard and bass...

s included echo, tremolo

Tremolo

Tremolo, or tremolando, is a musical term that describes various trembling effects, falling roughly into two types. The first is a rapid reiteration...

, tone control, and an octave divider. Notable Varitone players were Eddie Harris

Eddie Harris

Eddie Harris was an American jazz musician, best known for playing tenor saxophone and for introducing the electrically amplified saxophone. He was also fluent on the electric piano and organ...

 Lou Donaldson

Lou Donaldson

Lou Donaldson is a jazz alto saxophonist. He was born in Badin, North Carolina. He is best known for his soulful, bluesy approach to playing the alto saxophone, although in his formative years he was, as many were of the bebop era, heavily influenced by Charlie Parker.His first recordings were...

, and Sonny Stitt

Sonny Stitt

Edward "Sonny" Stitt was an American jazz saxophonist of the bebop/hard bop idiom. He was also one of the best-documented saxophonists of his generation, recording over 100 albums in his lifetime...

. Similar products included the Hammond

Hammond organ

The Hammond organ is an electric organ invented by Laurens Hammond in 1934 and manufactured by the Hammond Organ Company. While the Hammond organ was originally sold to churches as a lower-cost alternative to the wind-driven pipe organ, in the 1960s and 1970s it became a standard keyboard...

Condor.

Varitone is also the name of a device used for changing the sounds of an electric guitar, featured on Gibson's BB King "Lucille" signature ES-355.