Foley & Lardner
Recording medium playing apparatus with program discontinuity response
 A recording medium playing apparatus comprises a reading device for reading, from an information recording medium on which a sub-program signal carrying a musical instrument play control signal is written in order together with a main program signal, the main program signal and the sub-program signal simultaneously according to an order of writing, a musical instrument play control signal decoding device for decoding a musical instrument play control signal from the sub-program signal and supplying the musical instrument play control signal to electronic musical instruments, and a control device for controlling the operation of the reading device in response to an operational command. The control device is adapted to command the musical instrument play control signal decoding device to transmit a sound generation stop command signal when the content of the operational command is to cause the reading device to perform a reading operation in which the order of reading is different from the order of writing. 
Pioneer Electronic Corporation
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Osamu
Watanabe