This document defines various musical instruments, the people who play them, vocal ranges, musical groups, and roles within music. It lists the bass guitar, cello, drums, keyboard, organ, piano, saxophone, trumpet, and violin along with their players. It also defines tenor, bass, and soprano vocal ranges and the roles of orchestra, choir, singer-songwriter, rapper, soloist, and lead singer. The conductor, composer, and DJ roles are also outlined. Finally, it provides adjectives and phrases to describe music such as catchy, moving, rhythmic, monotonous, and recognizable tune.