The term PREP BEFORE PLAYING can be summarized as 'tuning' before playing. Tuning is the process of adjusting the pitch of a musical instrument to the correct frequency. This is done by tightening or loosening the strings of the instrument, or by adjusting the keys on a keyboard instrument. Tuning is an important step in preparing to play an instrument, as it ensures that the notes will sound correct and in TUNE with each other.