This document discusses different types of music including classical music, jazz, rock 'n' roll, and hip hop. It provides examples of genres and styles within each type of music such as symphonies, suites, and overtures for classical music; ragtime, New Orleans jazz, and scat jazz for jazz; and alternative rock, metal, and art rock for rock 'n' roll. It also notes that hip hop music is marked by importance of bass and beats with rapping as the predominant vocal form and lists freestyle rap, gangsta rap, and avant-garde hip hop as genres of hip hop.