The beat blocks are wireless realtime audio controllers built to allow a more natural control of musical dynamics for musical performance. Each block is a 4" cube made of wood and hollowed out to fit the circuitry. Two of the blocks are comprised of a 3-axis accelerometer attached to an XBee radio and 9-volt battery. The third block has 6 photocells and an XBee radio and 9-volt battery. These three blocks transmit control data back to an XBee radio attached to a laptop computer running MaxMSP.