| 摘要 |
PURPOSE:To enable transmitting MIDI signals among plural MIDI musical instruments with each other without using MIDI cables by transmitting radio signals modulated based on MIDI signals outputted from MIDI musical instruments. CONSTITUTION:An MIDI data receiving part 14 converts an MIDI signal of serial data outputted from a keyboard into a parallel signal and writes it successively to a transmission data temporary storage part 15. Written MIDI data arc read out in order of a write-in by a CPU 11 and then transmitted from a transmitter and receiver part 18 to other keyboards with a radio signal. At this time, a control signal output part 16 outputs a transmission control signal, a transmission channel control data and a receive channel control data outputted from the CPU 1 l to the transmitter and receiver part 18. The transmitter and receiver part 13 frequency-modulates a high frequency signal (a signal to be modulated) based on the MTOI signals inputted to a transmitter-receiver device 3 to generate a radio signal, which is outputted from an antenna. |
