The clave (pronounced clah-vay) is an important rhythm in latin music. It's a 2 bar rhythmic pattern in 4/4: first bar: Dotted quarter note, dotted quarter note, quarter note; second bar: quarter rest, quarter note, quarter note, quarter rest.
That's a 3-2 clave - because the first bar contains 3 notes, and the second contains 2. There is also the 2-3 clave, which is the same - but with the bars swapped round.
That's a 3-2 clave - because the first bar contains 3 notes, and the second contains 2. There is also the 2-3 clave, which is the same - but with the bars swapped round.