Here is another humanoid robot capable of playing a musical instrument. University of Tokyo researchers have developed the Kojiro robot with a body that mimics the way human skeleton, muscles, and tendons work to generate motion. While Kojiro uses DC motors, it uses them to pull cables to simulate how muscles and tendons contract and relax.
Kojiro has 100 tendon-muscle structures and 60 degrees of freedom. The above video shows how Kojiro can play the drums.