A double stroke is the execution of two strokes on one hand. At fast tempos, this will just involve one wrist turn, like a multiple bounce stroke. After the rebound, the back fingers can be closed more firmly around the stick to produce two notes precisely.
Play alternating double strokes, continuously accelerating until both strokes are produced by one wrist turn.
Note the differing amount of notes that will be produced by single wrist motions in every measure.
In reality, it is not possible to sustain or hold out notes on percussion instruments. Percussionists instead play a series of quick repeated strokes to achieve the effect of a sustain. Drumrolls are often written in a very specific way: a beamed single note tied to an accented single note. The names of numbered rolls come from the minimum number of strokes that will sound.
5 Stroke Roll: Double stroke with starting hand (2) + double stroke in opposite hand (2) + single stroke release (1) = 5
9 Stroke Roll: Double stroke with starting hand (2) + double stroke in opposite hand (2) + starting hand again (2) + opposite hand again (2) + single stroke release (1) = 9
Check out the Roll Rudiments page for all of the official double-stroke roll rudiments.
When the beaming of the first note is broken down into actual individual notes, it becomes clear that this is a 5 Stroke Roll.
This is also a 5 Stroke Roll, just using longer note values
This is a 9 Stroke Roll.
Detectable individual strokes
One rebound after the initial stroke, resulting in exactly 2 sounds per wrist motion (a double stroke)
Also known as a double-stroke roll
When to use: Concert marches or marching band, at the discretion of the director
Strokes blur together into one continuous sound
Multiple bounces after the initial stroke, resulting in 3 or more sounds per wrist motion
Also known as a buzz roll, press roll, or multiple bounce stroke roll
When to use: In most concert band, wind ensemble, and orchestral repertoire
Common problems that lead to uneven drum rolls include:
Different pressure on the sticks in each hand.
The fulcrum of each stick is in a different place.
Sticks are not hitting the drum head in the same spot.
One drumstick is being raised higher than the other.
The dominant hand is overshadowing the other hand.
The second measure should result in a closed roll. See if you can play the third measure more open. The final note should always be a clear single stroke!