RUDIMENT #6 OF 40 · ROLL RUDIMENTS
The double stroke roll plays two strokes with each hand: right, right, left, left. Played slowly it is open, with every note clear; sped up it becomes the smooth "long roll" of rudimental drumming.
R R L L
Capital letters are main notes. Small letters are grace notes played just before the main note.
Double strokes are the building block of every stroke roll below, and of countless fills and snare rolls.