- Is this the same as ballroom rumba?
- No. Ballroom rumba is a twentieth-century Western social dance adapted from Cuban son and bolero, with melody, harmony and a slow tempo. Cuban rumba is a folk tradition of percussion and voice alone, faster and far more rhythmically complex. Always state which one you mean when generating.
- How do I keep melodic instruments out?
- Exclude them explicitly: "percussion-only forces, three congas plus clave sticks, no melodic instruments, no harmonic instruments, no bass, lead singer answered by chorus." Without an exclusion clause, systems will almost certainly add a guitar or piano on their own.
- How do I describe the three drums?
- Name each role separately: "low drum holding the basic pattern, middle drum in fixed conversation with it, high drum improvising freely and interacting with the dancers." That division is where rumba's rhythmic complexity comes from; asking merely for "congas" returns a single-layer loop.