Deathcore is an amalgamation of two musical styles: metalcore and death metal. Deathcore is heavily influenced by modern death metal in its speed, heaviness, and approach to chromatic, heavily palm muted riffing and dissonance. Traditional growls, and screaming are prevalent, and sometimes metalcore yelling or shouting vocals are included. Sometimes "pig squeals" are included. Much of deathcore features heavy, downtuned breakdowns and melodic riffs common in metalcore.