＜Double Stroke＞
A double stroke is when you swing the stick down once and use the rebound of the head (and the control of your wrist and fingers) to hit a head twice.
When you swing the stick down once, it bounces off the head many times, and the rebound gets faster and smaller.
It looks like this in sheet music.
If you practice stopping the stick movement only the first two times, you will understand the feeling of a double stroke.
At first, practice single strokes twice on each hand.
To get the feeling of bouncing the stick, it is useful to practice dotted rhythms with each hand.
Practice combining single and double strokes to get used to double strokes.
First, hit a eighth note alternately from right to left (left and right) with single strokes.
Make only the first eighth note on the first and third beats into sixteenth notes with double strokes. Once the tempo speeds up to a certain degree, your wrist will move in the same way as when you are hitting eighth notes, and the tip of the stick will naturally bounce on the head.
In the same way, make only the backbeats of the first and third beats into sixteenth notes with double strokes.
Two eighth notes on the first and third beats with double strokes (two double strokes and the next single stroke are called a five-beat set).
Three eighth notes with double strokes (seven-beat set).
Four eighth notes with double strokes (nine-beat set).
Six eighth notes with double strokes (thirteen-beat set).
In this way, gradually increase the number of double strokes.
First, practice each pattern slowly, make sure that the volume of the first and second double hits are the same, and that the rhythm is uniform.
Once the volume and rhythm are consistent, gradually increase the tempo.
It seems that many bands make snare rolls a bit of a cheat, but even elementary school students can make a consistent roll if they practice properly. Once you get to a certain level, try practicing rolling for 1-2 minutes to release unnecessary force. Changing the volume in the middle is also a good practice.
First, decide how many hits you want to make in the rolls that appear in the song, and then practice them.
The number of hits varies depending on the tempo, but for a march tempo quarter note roll, first practice it as a sixteenth note, then double it to a nine-beat.
For a half note roll, practice it as a 17-beat.
A roll with double strokes like this is called an open roll, and is used in marches where it is better to hear the finer grains of sound.
There is also a closed roll (press roll), where the stick is swung down once and bounced over the head three times or more, which is used when you need a continuous sustained sound with no particles of sound, but first, practice the double stroke roll thoroughly as the basics.