Electronic musical instrument with a touch reponsive dc voltage generator

Abstract

Abstract An electronic musical instrument capable of controlling a tone color of a musical tone at the time of rise of the tone as well as the intensity of the tone in proportion to a key-depressing force so as to produce, in particular, a musical sound simulating to that produced by a wind instrument, whereby the expressionability of music can be improved. The said electronic musical instrument comprising a touch responsive DC voltage generator circuit for deriving a DC output at a level in response to a key-depressing force, a tone generator for generating a tone, signal, means for switching said tone signal by the output signal derived from said DC voltage generator circuit, a tonecoloring circuit including a filter for giving a musical tone color to the tone signal from said switching means, a pulsederiving circuit for producing a pulse from the DC output of said DC voltage generator circuit at the time of rise of the DC output, the intensity of the pulse being proportional to the intensity of the DC output, and a wave from transducer for converting the pulse from the pulse-deriving circuit into a control signal having a predetermined rising and decaying wave form, said filter circuit having variable impedance means whose impedance is varied by and in response to the control signal from the wave form transducer and as a result the frequency characteristic of the filter circuit being carried in response to the control signal.

Inventors

• 👤 Takeshi Adachi

Bibliographic Details