Grid resolution: equal grid steps per quarter-note beat.
Number of grid slots per bar (beatsPerBar(ts) * subdivision).
One entry per grid slot, in slot-index order (slot 0 is the downbeat).
OptionaltsThe time signature the template was extracted under. applyGrooveTemplate requires the apply-time meter to match this so the per-bar grid lines up instead of silently drifting. Optional for backward compatibility with templates constructed without it (in which case no check is performed).
A per-bar grid of timing and velocity deviations captured from a performance.