Joey DeFrancesco was an American jazz organist, trumpeter, saxophonist, and occasional singer. He released more than 30 albums under his own name, and recorded extensively as a sideman with such leading jazz performers as trumpeter Miles Davis, saxophonist Houston Person, and guitarist John McLaughlin.

The Hammond organ is an electric organ invented by Laurens Hammond and John M. Hanert and first manufactured in 1935. Multiple models have been produced, most of which use sliding drawbars to vary sounds. Until 1975, Hammond organs generated sound by creating an electric current from rotating a metal tonewheel near an electromagnetic pickup, and then strengthening the signal with an amplifier to drive a speaker cabinet. The organ is commonly used with the Leslie speaker.