| 摘要 |
PROBLEM TO BE SOLVED: To give a reverberation effect similar to that of a conventional mechanical reverberation device to an instrument sound signal, a sound signal, or the like by a device which has a low production cost and is easily handled and is compact. SOLUTION: First to third cyclic delay circuits 40, 50, and 60 circulate an input signal to simulate propagation of oscillation on a spring. Multipliers 44a, 44b, 47a, 47b, etc., supply the signal in the middle of circulation to another delay cyclic circuits 40, 50, and 60 to simulate propagation of oscillation between the spring and a base plate. A synthesized signal supply circuit 90 synthesizes signals in the middle of circulation to feed back them to first to third delay cyclic circuits 40, 50, and 60 to simulate the propagation characteristic of oscillation between the spring and an outer box. The output signal is fed back to first to third delay cyclic circuits 40, 50, and 60 through a multiplier 101 and the synthesized signal supply circuit 90 to simulate feedback of the acoustic signal to the spring. |
