What is a CDJ?

A CDJ is a professional digital music player used by DJs to play and manipulate music during performances. Originally designed to play audio CDs, modern CDJs can also play music from USB drives, SD cards, and other digital storage devices.

CDJs typically include a jog wheel, which allows DJs to scratch, cue, and adjust track timing in a way that mimics the feel of a vinyl turntable. They also feature controls for playback, looping, tempo adjustment, cue points, and track navigation, enabling DJs to mix songs smoothly during a performance.

CDJs are widely used in clubs, festivals, and professional DJ setups. They are often paired with a DJ mixer and are valued for their reliability, precise control, and ability to access large digital music libraries without needing physical records or CDs.