[Listening extract audio not available in printed QP] A Javanese gamelan performs. Metallophones play interlocking patterns and a gong sounds at each cycle'...

(a) The technique where individual players each contribute separate rhythmic or melodic patterns that combine to form a single composite line is called interlocking. [1]

In Javanese gamelan, interlocking (sometimes referred to by the Balinese term kotekan) means that no single player performs the complete melody or rhythm alone. Instead, each musician plays a partial pattern with rests or gaps, and when all the parts are layered together, they interlock like the teeth of a cog to produce a continuous, seamless musical line. This technique creates a dense, shimmering texture that is a hallmark of gamelan music.

(b) The gong marks the end of each rhythmic and melodic cycle, providing structural punctuation by signalling the completion of each repeating cycle. [1]

In gamelan music, the large gong (gong ageng) is the most important structural instrument. It sounds at the end of each complete cycle (called a gongan), acting as a rhythmic landmark that tells all the players where they are in the form. The gong stroke is the most significant moment in the cycle, comparable to a strong downbeat in Western music. Other smaller gongs and instruments (such as the kenong and kempul) mark intermediate points within the cycle, creating the layered, hierarchical time-keeping system known as colotomic structure.