Clave is the most important word in this whole track. It's a Spanish word for "key" — the rhythmic key that unlocks every Latin and Afro-Cuban style. The clave is a two-bar pattern of five notes spread across eight beats; once you hear it, you hear it everywhere — in salsa, mambo, songo, rumba, samba, even hip-hop and pop tunes that grew up on Latin radio.
Here is the most important thing to understand up front: the clave is not always played. It's felt. In a salsa band, a percussionist might tap it on a wood block, but the kit drummer often doesn't play the clave directly — they play around it, with every limb keyed to the clave's accents. The clave is the underlying pulse the entire ensemble agrees on. Once it locks, the music locks. Below we lay it out clearly: each clave hit is notated at its true note value (quarter or eighth), with rests sized to land the next hit exactly where it belongs. Read each bar by counting "1 — 2 & — 3 — 4" out loud and watching the hits drop into the right slots.
Son and Rumba
The two clave families used in Cuban music are son clave and rumba clave. Both are two-bar, five-note patterns. They differ by exactly one note: in son, the third hit of the 3-side is on beat 4; in rumba, that same hit is delayed by an 8th to land on the &-of-4. That single 8th-note displacement is the difference between salsa (son) and folkloric rumba.
Exercises
Cross-stick: lay the stick across the snare with the tip on the head and the butt clicking the rim — the click sound, not the full snare crack. The notation uses c/5 on the snare line and the hits are accented because clave is meant to project. Count out loud: 1 — 2 & — 3 — 4 || 1 — 2 — 3 — 4 ||. The visible rests are part of the lesson — clave is as much about where it isn't as where it is. Loop the two bars as one phrase. Do not rush from bar 2 back to bar 1; the pause at the end of bar 2 is part of the cycle.
Same five notes as Exercise 1 — but the 2-side comes first. Most salsa is in 2-3; many Afro-Cuban folkloric tunes are in 3-2. The drummer must know which direction the band is in and play accordingly. A song's melody and bass line are written in a clave direction; if you flip the clave on the band, the music sounds wrong ("cruzado" — crossed). Loop this until 2-3 feels as natural as 3-2. Then alternate: four cycles of Exercise 1, four cycles of this one, back and forth.
Compare to Exercise 1. Son's third hit was on beat 4; rumba's third hit slides one 8th later, to & of 4. The 2-side is identical. That single 8th-note displacement is the difference between salsa (son) and folkloric rumba (guaguancó, yambú, columbia). Play Exercise 1 once, then this one immediately after — your ear should hear rumba as more syncopated, more delayed, more African in feel.
Now clave goes on the kit against a steady foot pulse. The cross-stick on the snare plays son 3-2; the kick stomps 1 and 3; the hi-hat foot chicks on 2 and 4. The hand has to hold its syncopated pattern against a perfectly square foot pulse. Notice the rests in the hand voice are now invisible — the feet are already articulating where the silent beats are, so visible rests would be clutter. If the cross-stick starts dragging the feet around with it, slow to quarter = 80 and rebuild from there.
Same texture as Exercise 4 with the clave reversed. The feet do not change — that's the point. Quarters are quarters. The hand must know which side it's on and not be pulled around by the foot. Practise this for a minute, then immediately switch back to Exercise 4 (3-2) without stopping. Switching directions cleanly is the goal: the feet keep going, only the hand direction flips.