| 摘要 |
PURPOSE:To reduce the mixing of an external noise and to obtain a sound of timbre close to that of the musical sound of a natural musical instrument by composing the timbre controller of a filter circuit consisting of a fluid delay element. CONSTITUTION:The electric signal from a sound source 11 is inputted to an amplifier 13, whose output is inputted to the fluid delay element(FDU) 15 as a delay means. The output of this fluid delay element 15 is inputted to an amplifier 17 again and then inputted to an amplifier 21 through an equalizer 19, and the electric signal which is amplified by the amplifier 21 is outputted as an acoustic signal from a speaker 23. The fluid delay element 15 delays the electric signal supplied from the amplifier 13 to the equalizer 19 by a specific time and the signal is fed back to the fluid delay element 15 as well as the amplifier 17 to constitute a filter circuit (comb type). Consequently, the influence of an external noise is hardly exerted and timbre close to that of the natural musical instrument is obtained. |
