At live music venues and event spaces, PA staff frequently repeat "one-two" and "check-check" into microphones. In this article, we explain what PA engineers actually listen for during mic checks, including the common theory that "one" is used to check low frequencies and "two" is used to check high frequencies. We also share some helpful tips on how vocalists and backing vocalists can project their voices during rehearsals to make the PA staff's job easier. If you are interested in live performances or PA work, be sure to check it out!

The Mystery of the Mic Check