Ritmos de Rumba y Salsa: guaguanco, tribal drums and where the quinto goes
How a rumba and salsa percussion mix works: the three conga roles in guaguanco, what the quinto is improvising against, and how folkloric drumming feeds a salsa arrangement.
Guaguanco is played on three congas with fixed roles. The low tumbadora holds the base pattern, the middle segundo answers it, and the high quinto improvises on top. Everything the quinto plays is measured against the clave and against the two fixed drums, which is why rumba sounds conversational rather than chaotic.
Three drums, three jobs
The clearest way into rumba is to stop hearing the drums as one instrument. In guaguanco there are three, and only one of them is free.
The tumbadora, the lowest, plays the base part and does not vary much. It is the floor. The segundo plays a complementary figure that interlocks with the tumbadora so that between them they fill the bar. Together those two are called the marcha, and they are the fixed ground.
The quinto, the highest and sharpest, improvises. It comments on the dancers, marks their movements, sets up phrase endings and generally behaves like a lead voice. A quinto player who is doing the job is not soloing over the ensemble, they are talking to it.
The clave underneath
Rumba clave is not identical to son clave. The third stroke of the three side sits slightly later, which small difference changes the whole feel and is one of the first things a percussionist crossing from salsa into rumba has to unlearn. Once you know it is there, you can hear the quinto placing its accents in relation to it rather than in relation to the bar line.
How this feeds salsa
A salsa conga part is essentially a simplified, regularised descendant of the rumba marcha, adapted so that one player can hold it while a horn section works over the top. When a salsa arrangement wants to raise the temperature, one of the most effective moves available is to open the percussion back out towards rumba for a chorus: strip the horns, let the drums converse, then bring the mambo back in.
That is what a mix of rumba and salsa material is doing across a longer span. It alternates between the folkloric source and the dance band that grew out of it, and the contrast makes both sound sharper.
Further reading
The Afro-Cuban guide covers yambu, guaguanco and columbia, the bata trio and the six eight bell. The salsa guide explains how the clave governs a horn arrangement.
The Afro-Cuban Percussion Mix playlist page covers when to put this on rather than what it is.