Funk music is often structured in this way to allow a degree of improvisation, often by the vocalist, and the repetition of the riffs plus the groove of the rhythm section make a very danceable style....Funk music is often structured in this way to allow a degree of improvisation, often by the vocalist, and the repetition of the riffs plus the groove of the rhythm section make a very danceable style. “Flash Light”from 1978 features a bass riff, but the riff is performed on a synthesizer instead of a bass guitar.