| 摘要 |
PURPOSE:To improve the transmission speed of playing information by superimposing a spread signal onto 1st playing information. CONSTITUTION:Playing information stored in a RAM 19 is fed to an SIO 10 or a latch circuit 14, converted into an MIDI signal S0 being a serial data and fed to one input terminal of an adder 11. Moreover, the SIO 10 gives a MIDI signal fed via an LPF 12 to a CPU 18 via a data bus 21. The MIDI signal is subjected to frequency spread for each signal at a spread circuit 15 and the result is synthesized and outputted as a spread signal S9. While the MIDI signal S0 is fed to the SIO 30 through an LPF 32, the spread signal S0 is fed to an inverse speed circuit 37 via an LPF 33. |
