Single Stroke Four
R L R L L R L R
Practice tempo
What it teaches
Starting and stopping a burst of alternating strokes exactly on a target subdivision (usually a triplet followed by a downbeat, or as three grace notes before an accented note like a ruff) — unlike the open-ended Single Stroke Roll, the four must begin and end cleanly with no extra note trailing on either side.
The common mistake
Players comfortable with the open Single Stroke Roll let a four-note burst run one note long or clip one note short, because they're used to judging roll length by feel rather than counting; the fix a teacher gives is counting "1-2-3-4" out loud on every repetition until exactly four strokes land, no more and no fewer.
Tempo progression
Start at 70 BPM playing the four-note figure once per beat with a clear gap of silence after each group so the start and stop are both audible. Add 10 BPM once ten consecutive reps land clean with no extra or missing note; most players can place it cleanly through 150-170 BPM.
Where it shows up
The four-stroke burst that ends a fill right on the downbeat of the next bar — a shorter, punchier alternative to a full single stroke roll when a fill needs to resolve exactly on beat one, and the basis of the 'four stroke ruff' ornament in rudimental repertoire.