MusicReasonResource
Groove, Swing, Tuplets, and Polyrhythm
Rhythmic feel comes from relationships between grids, grouping, and placement; a ratio or grid model explains that feel, it never fully replaces it.
MusicReasonResourceGroove, Swing, Tuplets, and Polyrhythm
Rhythmic feel comes from the relationship between a steady grid and where notes actually land relative to it, not from a single number. A ratio, a grid diagram, or a millisecond offset can model that relationship usefully, but none of them is a complete description of how a groove actually feels.
A swing ratio is a reference point, not a genre rule
A 2:1 swing ratio means the first eighth note in a beat lasts twice as long as the second.Swing Ratio Explorer uses 2:1 as a clear reference, while real performed swing ranges anywhere from a light shuffle much closer to even eighths to a heavier, more triplet-based feel, depending on style and tempo.
A polyrhythm shares a downbeat, then disagrees on everything else
A 3:2 polyrhythm layers three evenly spaced pulses against two evenly spaced pulses over the same span of time. Both patterns start together, but every pulse after that lands in a different place, which is what makes the combined pattern's full cycle three-against-two beats long before it repeats. Polyrhythm Trainer makes both layers audible and visible at once, at a tempo you control.
A tuplet's ratio is fixed; its duration is not
A triplet eighth note is always exactly 2/3 the duration of a plain eighth note, at any tempo. What changes with tempo is only the underlying quarter-note duration everything else scales from. Tuplet Calculator applies this fixed ratio to your chosen tempo and note value.
A grid offset in milliseconds makes placement concrete
Groove Grid Explorer expresses a note's placement relative to the underlying grid as an exact millisecond offset, ahead of or behind the beat, which turns a fuzzy verbal description ("laid back," "pushing") into a specific, comparable number.
This is a modeling and practice layer, not a performance grade
Rhythm Pattern Generator and Rhythm Ear Trainer use these same ratios and grids to build practice material and score a specific exercise attempt; none of this claims to diagnose a player's timing in a real performance, only to model and drill a stated rhythmic relationship.
Frequently asked questions
A 2:1 ratio is one common reference point (the long note takes twice the short note's duration), but real swing ranges from a light shuffle closer to even eighths to a heavier triplet-based feel; Swing Ratio Explorer treats 2:1 as a stated reference, not a universal genre rule.
A 3:2 polyrhythm layers two different, evenly spaced groupings (three even pulses against two) over the same span of time, so the two patterns share a downbeat but disagree on every other pulse, unlike a straight subdivision, which nests evenly inside one grid.
The tuplet ratio itself never changes (a triplet eighth is always 2/3 the length of a plain eighth), but the actual millisecond duration scales with tempo exactly like any other note value, since both derive from the same quarter-note duration.