Waveform signal generator

Details Waveform signal generator Waveform signal generator

1990-04-19

1993-11-23

Shoop, Jr., William M.

Music

Instruments

Electrical musical tone generation

84627, 84663, G10H 704

Patent

active

052646572

ABSTRACT:
A parameter signal generator including a parameter generating information storing unit for storing parameter generating information necessary for generating a parameter signal, and a parameter signal generating unit for generating a parameter signal. The parameter generating information is serially read from the parameter generating information storing unit and the thus-read parameter generating information is preset in a parameter signal generating unit other than the parameter generating information storing unit. Therefore, the parameter signal generator includes a storing unit other than the parameter signal generating unit, and accordingly, a general-use memory can be employed as the storing unit, to substantially lower cost. The processing of generating and radiating musical sounds can be performed at a practically required speed by employing a high speed processor as a central processing unit. Further, in the parameter signal generator, the length of time necessary for repeatedly generating a part or all of the parameter signal is measured, and when the measured length of time becomes equal to a predetermined length of time, the processing of repeatedly generating a part or all of the parameter signal is stopped. Accordingly, the length of time needed for repeatedly generating the parameter signal can be kept at a constant value, regardless of the pitches of musical sounds to be radiated, and thus, the inclusion in a musical sound radiated by the electronic musical instrument of an unnecessary changing factor, in response to the change of the pitch thereof, can be prevented.

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