Electronic musical instrument of waveshape memory type
AssigneeNippon Gakki Seizo Kabushiki Kaisha
InventorsShigeo Ando, Takayasu Kondou
Life of this patent
Estimating the term…
Abstract
In an electronic musical instrument of a keyboard type wherein waveshapes with different tone colors read out from waveshape memories are mixed together at a mixing ratio according to a control signal and the resultant signal is converted to a corresponding musical tone, the control signal is varied with lapse of time and also is controllable in response to the initial speed at which a key of the keyboard is depressed and to the strength of pressure of the key being depressed, in addition to time lapse. Thus, the pattern of tone variation can be variously controlled.
Claims14
A keyboard style electronic musical instrument comprising:
- a plurality of waveshape storage means storing waveshapes with different tone colors, said waveshapes being same in fundamental frequency but different from each other in amount of harmonics;
- addressing means responsive to the operation of a key of the keyboard for addressing said waveshape storage means to read out said waveshapes from the waveshape storage means at a repetition rate corresponding to a depressed key of the keyboard;
- mixing means for mixing the waveshapes read out from said waveshape storage means, at a mixing ratio according to a mixing ratio control signal;
- conversion means for converting the output of said mixing means to a corresponding musical tone;
- touch-responsive means responsive to the operation of the key of said keyboard for generating a first touch-responsive signal corresponding to the initial speed at which the key of said keyboard is depressed, and a second touch-responsive signal corresponding to the strength of pressure with which the key is depressed;
- generating means responsive to the operation of the key of said keyboard for generating a time-dependent signal changing with time after the key depression;
- and
- producing means for producing said mixing ratio control signal on the basis of said first and second touch-responsive signals and said time-dependent signal.
In a keyboard type electronic musical instrument including a keyboard having a plurality of keys;
- a plurality of waveshape storage means for obtaining a plurality of waveshape component signals having different harmonic content;
- means for combining said waveshape component signals in a ratio determined by a plurality of mixing parameters, each of said mixing parameters being associated with a predetermined one of said waveshape component signals;
- and means for obtaining sound from the output of said means for combining the waveshape component signals;
- the improvement comprising:
- first information means for generating a depression-speed signal indicative of the speed at which a selected one of said keys is depressed;
- second information means for generating a time-lapse signal indicative of a period during which said selected one of the keys is depressed;
- third information means for generating an applied-pressure signal indicative of the pressure with which said selected one of the keys is depressed;
- and
- means responsive to said depression-speed signal, said time-lapse signal, and said applied-pressure signal for providing said plurality of mixing parameters.
Dependencies are inferred from the claim text.