to knock (or knocking sound), but in this case refers to the three gongs; while tilu means three), the instruments include a rebab, a small upright bowed instrument, also known as a spike fiddle, other small gongs — a hanging gong and two iron plates, and two or three barrel drums. The traditional singer is female or a sinden, but also dances and invites men to dance with her sensually, so it is assumed she is a prostitute or ronggeng. The ensemble is small enough to be carried from village to village to places where a saron or kempul may be added.