What’s the Difference Between 3–2 and 2–3 Son Clave? A Two-Bar Pad Drill

Three labels answer three different questions

Berklee PULSE describes son and rumba as two clave types and explains that either can run 3–2 or 2–3. “Son” therefore identifies the pattern family used in this exercise; “3–2” identifies which side begins the two-bar cycle. Do not collapse those labels into one setting.

3–2 son clave is not a 3:2 polyrhythm. The dash in 3–2 points to a two-bar direction: three strokes in the first bar, two in the second. A 3:2 polyrhythm drill coordinates two evenly divided layers at the same time. The similar numbers do not make the structures interchangeable.

Son and rumba differ inside the 3-side, not by the 3–2 label

Berklee’s lesson identifies the placement of the last 3-side stroke as the distinguishing difference between son and rumba clave. In the simplified eighth-note comparison used by Soundbrenner and the Smithsonian teaching plan, son places that stroke on beat 4, while rumba places it later, commonly represented at 4&. The 2-side remains on beats 2 and 3 in this comparison. If you move the last B3 stroke to 4&, you have changed the clave type; you have not merely changed direction.

The five addresses fit two eight-slot bars

Count each 4/4 bar as 1 & 2 & 3 & 4 &. Use one short, identifiable pad sound. Do not add kick, snare, fills, accents, or note repeat yet. The exercise first tests address and bar order; dynamics and orchestration are separate choices.

Key: X = one clave stroke; · = silence. B3 is son 3-side on 1, 2&, 4. B2 is 2-side on 2, 3. The Rumba-check row is a comparison only; do not play it inside the son-clave versions.

The empty slots matter. B3’s second stroke is not beat 3; it anticipates beat 3 on 2&. Its third stroke is on beat 4, not 4&. B2 contains two numbered-beat strokes with no extra hit at the bar line. Say the count through the silences rather than using the three or two hits as a replacement clock.

B3 and B2 make each side independently observable

Choose a tempo at which you can say all eight subdivisions and strike the intended pad without tension. That may differ by player, controller, sound, and session. A slower number is not automatically correct, and a faster number is not evidence of understanding. Keep the same tempo and monitoring path for B3 through R.

1. B3 — three-side baseline: count one full bar aloud and strike only 1, 2&, 4. Continue counting the final &. Record at least one complete bar plus the next downbeat so the loop seam is visible.
2. Mute-and-count check: perform the same bar silently with the pad hand while keeping the spoken count. If the hand moves to beat 3 or 4&, repair the address before restoring sound.
3. B2 — two-side baseline: without changing tempo or pad, strike only beats 2 and 3. Keep counting through beat 4 and its &; do not treat the second strike as the end of the bar.
4. Identity check: B3 must contain three onsets and B2 two. If available, count recorded MIDI Note On events; otherwise label the observation “audible attacks” rather than claiming raw MIDI evidence.

Do not search for one “correct” velocity. Equal input values do not guarantee equal perceived loudness, and a stylistic accent decision cannot repair a wrong grid address. For this pass, use a level that makes every attack identifiable and record any dynamic variation separately.

C32, C23, and R test direction instead of memory for one bar

Once B3 and B2 pass separately, join them without editing either bar. C32 means B3 followed by B2. C23 means B2 followed by B3. R is a fresh return to C32 after C23; it proves that changing direction did not permanently shift the bar labels or insert a restart.

Invariant: every row has five attacks over two bars. C23 reverses the bar order only. It does not rotate the grid by one beat, move the 2& stroke, or change son into rumba.

1. C32: announce “three, two” before starting. Play B3 once, cross the bar line without pausing, play B2 once, then land silently on the next bar’s beat 1.
2. C23: announce “two, three.” Start from an untouched count-in, not the tail of C32. Play B2 then B3 with the same count, sound, tempo, and intended intensity range.
3. Direction label check: hide the visual rows and say which side is in bar 1 and which is in bar 2. If the answer depends only on hearing “three hits first,” restore the spoken subdivision and mark the exact addresses.
4. R return: after C23, make a fresh C32 take from the written grid. R must reproduce C32’s bar order and five addresses without borrowing C23’s first bar.
5. Context pass: only after the event and direction gates pass, try the selected direction with an authorized recording or an ensemble exercise whose direction has been established by a knowledgeable source. Do not force either row onto every Latin-music recording.

The first failed invariant chooses the next repair

The grid is a doorway into listening, not ownership of a tradition

Smithsonian Folkways frames bell and clave patterns through connections among West African and Afro-Caribbean music, listening, movement, geography, and the forced movement of African peoples through the transatlantic slave trade. The Library of Congress presents Havana-born vocalist and composer Daymé Arocena discussing and demonstrating Cuban and rumba clave. Those contexts matter: the five X marks are not a culture-free MIDI preset.

Berklee’s classroom lesson notes that clave may organize a piece even when the pattern is implied rather than played on its own. After the pad grid passes, listen for how a bass line, melody, percussion part, or phrase relates to the two-bar direction instead of adding a loud clave sound over every track. Use recordings you are allowed to practice with, identify artists and traditions accurately, and treat uncertainty as a reason to listen or learn—not to attach a generic “Latin” label.

Yamaha’s FGDP-30 manual lists 3–2 and 2–3 son and rumba clave among that device’s Click Pattern choices. It is useful evidence that the four labels remain distinct in a real practice tool. It does not define how every product implements clave, and it does not establish any FingerDrum feature. If your own device offers a named pattern, compare its documented label and audible addresses with the grid before using it as the reference.

Son-clave direction questions

Does 2–3 change any of the five son-clave stroke positions?

No in this basic two-bar model. It places B2 first and B3 second. If an event moves inside either bar, another edit occurred in addition to the direction reversal.

Why not call 3–2 son clave a 3:2 rhythm?

Because the notation answers a different question. The dash labels three attacks in one bar followed by two in the next; the colon in a 3:2 polyrhythm describes two pulse divisions sounding over a shared span. Practice them as separate structures.

Are son and rumba clave the same if both are 3–2?

No. In the simplified comparison used here, the last 3-side stroke is on beat 4 for son and later, represented at 4&, for rumba. Both types can still be ordered 3–2 or 2–3.

Which pad, finger, tempo, and velocity should I use?

Use one reachable pad and an identifiable short sound at a tempo and intensity that let you count without tension. This guide provides no universal fingering, BPM, or velocity target. Freeze those choices only long enough to make B3 through R comparable.

Should the clave always be audible in a song?

No. Berklee’s lesson explicitly notes that the pattern may be implied while still organizing the feel. Listen to the whole two-bar phrasing and seek informed guidance instead of assuming a missing click means there is no clave relationship.