One major point of differentiation between rolling techniques is between Metered and Unmetered rolls. There are many interpretations of concert rolls and while the variations result in a similar rolling sound, there are subtle audible differences. The loud first bounce occurring closer to the quiet 3rd bounce from the preceding hand give the illusion that the bounces have a more even volume.
One way to mitigate the loss of sound is to overlap the 3rd bounce from one hand with the first bounce of the next in the manner of a Flam Tap, only much faster and smaller. This involves the arm, the wrist, and the fingers. Because a multiple bounce stroke on a drum head loses energy, and volume, with each successive bounce, it is necessary to use special tactics and techniques to mitigate the loss of sound and cause the repeated notes to sound even. The aim of a closed roll is to reproduce the effect of a sustained note on an instrument which inherently produces a short, staccato sound. The closed concert roll (orchestral roll, buzz roll, or press roll) is performed by creating 3 (or more) equal sounding bounces on each hand alternating right to left, repeatedly and quickly. For the English record, see Close Roll.Ī common snare drum roll is the closed roll.
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