Electronic musical instrument

Details Electronic musical instrument Electronic musical instrument

1977-02-22

1978-04-25

Jackmon, Edith S.

Music

Instruments

84 101, 84 126, 84DIG7, G10H 102

Patent

active

040856470

ABSTRACT:
An electronic musical instrument capable of controlling tone pitch, tone color, volume etc. of a musical tone by a sliding operation to conduct such on effect as portamento. The instrument according to the invention can produce a control signal proportional to a sliding distance on a portamento playing actuator regardless of an initially touched position on the actuator. For producing such control signal, an output voltage from a portamento playing actuator corresponding to a finger touch position is applied to a positive input of a calculator whereas a voltage obtained by sampling and holding an output voltage corresponding to the initial touch position is applied to a negative input of the calculator. Difference between the two voltages is outputted as a control voltage from the calculator and this control voltage is utilized for controlling VCO, VCF or VCA thereby to control the tone pitch, tone color, volume etc. of a musical tone.

REFERENCES:
patent: 3902392 (1975-09-01), Nagahama
patent: 3960044 (1976-06-01), Nagai et al.

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