Sarod is an instrument which is derived from the Rebab. It is not an ancient instrument, probably not more than 150 to 200 years old. It is essentially a bass Rabab. It has a metal fingerboard with no frets. The bridge rests on a taut membrane which covers the resonator. The Sarod has numrous strings, some of which are drones, some which are played, and some are sympathetic. The approach to tuning is somewhat similar to other Indian stringed instruments. It is played with a pick made of coconut shell.