This equipment included radio transmitters and receivers and large phonograph turntables. Some larger boomboxes even contained vertically mounted record turntables. He later practiced DJing using his friend's turntables and mixer. The unit has inputs for two stereo turntables or CD players and one unbalanced microphone. Schaeffer used a PA system, several turntables, and mixers. Turntables, sequencers and samplers are sometimes included. He can play the guitar, bass guitar, keyboards, piano, turntables, mandolin, ukulele, and drums. DJ turntablism has origins in the invention of direct-drive turntables. The equipment consisted of numerous speakers, turntables, and one or more microphones. He helped DJ Scratch assemble and disassemble his turntables at shows. Stanton produces a range of turntables for DJs. Le Tigre plays Farfisa organs, samplers, turntables, and guitars on the album. Turntablism has origins in the invention of direct-drive turntables. They are historically renowned for the range of phonographs (turntables) they produce. Jackson began rapping in a friend's basement, where he used turntables to record over instrumentals.