A pitch pipe is a small musical instrument used to provide a reference pitch for singers and musicians. It typically consists of a metal or plastic body with several holes, each corresponding to a specific musical note. When a player blows into the pipe, it produces a clear tone that helps performers tune their voices or instruments, ensuring they are in harmony. Pitch pipes are commonly used in choral settings, where groups like choirs need to start singing in unison. They are also helpful for guitarists and other musicians who want to ensure their instruments are properly tuned before playing.