Thirteen Stroke Roll
RR LL RR LL RR LL R
What it is
Six doubles and a release. Six roll pulses into an accent, usually spanning a beat and a half.
How to practice it
Count the pulses, six hand motions and then the target. If you lose count in the middle, slow down and count the hand motions instead of every note. The check is the same as every long roll. Nobody should be able to hear where the doubles switch hands.
Where you'll hear it
Marching and concert snare parts where the roll has to last a beat and a half.
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