The cha-cha-chá cell comps rather than rolls: single strikes spaced around declared rests, the middle of the bar left open for everyone else, then a three-note run home to the low course across the last three slots. Three of its eight slots are silent. It is the sparsest of the three cells and the most exposed — every note it does play is on show.
The pattern, step by step
Eight eighth notes, written in tres course numbers (1 is the highest-pitched course, 3 is the lowest). The pitches below are computed from the instrument's real open-course tuning with the library's first C major voicing under the hand — nothing in this table is typed by hand:
| Eighth | Course | Sounds | Pitch |
|---|---|---|---|
| 1 | 3 | C | 72 |
| 2 | — | rest | — |
| 3 | 2 | C | 60 |
| 4 | — | rest | — |
| 5 | 1 | E | 64 |
| 6 | — | rest | — |
| 7 | 2 | C | 60 |
| 8 | 3 | C | 72 |
This cell touches 3 courses (3, 2, 1) and carries 5 strikes and 3 rests; it opens on the lowest course and strikes its final eighth.
Playing the space
The temptation in a sparse cell is to decorate it. Resist that for as long as you can: the figure works because its strikes land exactly where they land and nowhere else, and a grace note in one of the rests moves the whole bar. Count every slot — struck and silent — at a tempo slow enough to be boring, and let the run home in the last three slots arrive as one gesture rather than three decisions.
Then trade bars with a recording or another player: one bar of the cell, one bar of silence from you while the band answers. Comping is a conversation, and this cell is the tres's politest sentence in it — the metronome keeps you honest about where your bar actually ends.
Where it sits
Come to this cell after the guajira and the son montuno — space is only playable once the hand trusts the pulse. The chord library charts what each strike can carry, and the hub holds all three cells side by side.