A cross-genre fusing vocal and instrumental elements of hip hop with various forms of rock. Rap rock's most popular subgenres include rap metal and rapcore, which include heavy metal-oriented and hardcore punk-oriented influences, respectively. Allmusic describes rap metal as having "big, lurching beats and heavy, heavy riffs" that "occasionally [...] [sound] as if the riffs were merely overdubbed over scratching and beat box beats", and described rap rock as having a more organic sound, characterizing many songs in the genre as rock songs in which the vocals were rapped rather than sung. Allmusic also states that the rhythms of rap rock are rooted in that of hip hop, with more funk influences than normal hard rock.
