Ska is a popular music from Jamaica that began in the 1950s. Ska music that was first played at a slower tempo then became reggae in the late 1960s.

Ska music bands include singers, electric guitars, electric bass guitar, piano, organ, saxophone, trumpet, and trombone. In ska, the electric guitar and piano normally play short chords on the off-beat. If you go "one and two and three and four", the off-beat is the "and".