A pre-show session where the DJ and sound engineer test and configure the PA system, booth monitor levels, and signal routing before doors open.
A soundcheck is a pre-event session in which the DJ and venue sound engineer verify that all audio signals are routing correctly, set output levels on the PA and booth monitor, and address any noise or feedback before the crowd arrives. It typically covers gain staging from the mixer to the amplifiers, confirming the DJ's cue signal is isolated, and checking that no hum or ground noise is present in the system.
Why it matters
Walking up to an unchecked rig mid-set means discovering problems in front of an audience. A soundcheck gives you time to trace a ground loop, dial in booth monitor volume relative to the PA, and set a reference gain level so you are not chasing headroom all night.
In practice
Arrive early, play a well-known track at set volume, and walk the room while the engineer adjusts the PA. Then stand at the booth and set the booth monitor so you can hear without straining. Confirm your channel gain is unity before doors open and note the position so you can return to it quickly.
