The tabla is two drums with two temperaments: the dayan (right, also called the tabla proper) — a tapering block of dense wood, usually sheesham, tuned precisely to the soloist's Sa — and the bayan (left) — a rounded kettle of metal (once clay) whose deep voice the player's palm-heel bends like a wave.
The head — the pudi — is itself a made thing of layers, and its three zones are why one drum holds many voices: the kinar (rim), the open maidan, and the syahi — the black disc of iron-rich paste applied dot by dot and polished, which tunes the drum's overtones into harmony. Tuning is physical craft: hammer taps on the gajra braid and the gatta blocks under the baddhi straps raise and lower Sa.