sound check

US /ˈsaʊnd tʃek/
UK /ˈsaʊnd tʃek/
"sound check" picture
1.

a test of the sound equipment, especially before a performance, to ensure that the levels are correct and the sound quality is good

:
The band did a quick sound check before the concert.
We need to do a proper sound check to avoid any issues during the live broadcast.
1.

to test the sound equipment, especially before a performance, to ensure that the levels are correct and the sound quality is good

:
The engineers are sound checking the microphones.
We need to sound check all the instruments before the show starts.