Drum rudiments

A blast beat is a type of drum beat that originated in hardcore punk and grindcore, and is often associated with certain styles of extreme metal, namely black metal, death metal and their respective subgenres, and occasionally in metalcore. In Adam MacGregor's definition, "the blast-beat generally comprises a repeated, sixteenth-note figure played at a very fast tempo, and divided uniformly among the bass drum, snare, and ride, crash, or hi-hat cymbal." Blast beats have been described by PopMatters contributor Whitney Strub as, "maniacal percussive explosions, less about rhythm per se than sheer sonic violence". According to Brad Schlueter of Drum!,

In rudimental drumming, a form of percussion music, a drum rudiment is one of a number of relatively small patterns which form the foundation for more extended and complex drumming patterns. The term "drum rudiment" is most closely associated with various forms of field drumming, where the snare drum plays a prominent role. In this context "rudiment" means not only "basic", but also fundamental. This tradition of drumming originates in military drumming and it is a central component of martial music.