I would just like to reiterate that Rap/Hip-Hop is in fact, music:

The art of arranging sounds in time so as to produce a continuous, unified, and evocative composition, as through melody, harmony, rhythm, and timbre.
Vocal or instrumental sounds possessing a degree of melody, harmony, or rhythm.

A musical composition.
The written or printed score for such a composition.
Such scores considered as a group: We keep our music in a stack near the piano.
A musical accompaniment.
A particular category or kind of music.
An aesthetically pleasing or harmonious sound or combination of sounds: the music of the wind in the pines.