Line Check

A line check is a fast, channel-by-channel signal test to confirm that every audio input on stage is working and patched to the correct console channel. Unlike a full soundcheck, a line check doesn't involve the full band playing together or the engineer dialing in a detailed mix.

How a line check works

Each input gets a quick test: the drum tech hits the kick, the guitar tech strums a chord, the vocalist says a few words into the mic. The FOH and monitor engineers confirm signal on each channel and set rough levels. The whole process can take 5-15 minutes.

When line checks are used

Line checks are standard at festivals, where multiple acts share a stage and there isn't time for every band to do a full soundcheck. Support acts on tour often get a line check rather than a full check. The engineers adjust the mix on the fly during the first few songs.

Line check vs. soundcheck

A soundcheck is a rehearsal-level session where the band plays and engineers dial in the mix. A line check is purely technical — confirming the signal path works. The difference is 5 minutes vs. 30-60 minutes, and the quality of the starting mix reflects that.