Both of these devices are proprietary, closed systems that accomplish the specific function of controlling the piano.
The piano originally comes with two such controllers: the handheld Pocket Remote Controller (PRC), as well as the larger Tablet Remote Controller (TRC). It communicates via the 802.11b protocol (WiFi), which allows the piano to transmit and receive information to/from nearby wireless controllers.
The Yamaha Disklavier Mark IV piano, which debuted in 2004, is the first instrument with wireless capabilities built-in. A new breed of musical devices is starting to integrate technology that allows the wireless transmission of MIDI (Musical Instrument Digital Interface) messages, real-time audio and video data, control data for performance synchronization, and commands for remote hardware control of these instruments.
The music technology industry is only recently beginning to realize the potential of wireless communication technology for control and communication of data for music and multimedia applications.
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