This chapter explores the little studied technological craft of instrument making in South India, where the local soil, weather, ground water is unique to the region in growing jackfruit tree for a sweet fruit and to make a sound kattai (wood) for musical instruments which travel transnationally. It further narrates the plant-human relationship through the connected actors like plantation workers, owners, craftspeople, musician in crafting customised kattai for individual musicians’ sound taste. Through field work and archival documents, this chapter ultimately brings out how historically jackfruit wood logs became perfect wood for making instruments and the technological changes brought by the local makers in making, repairing and maintaining the instruments’ sound in South Indian soundscape.