Resonance tone generation apparatus and resonance tone generation program

摘要

A resonance tone generation apparatus 20 is applied to an electronic musical instrument DM having a tone generator for generating, in accordance with a tone generation instruction signal having a key number n, a musical tone signal indicative of a piano sound having a key tone pitch specified by the key number. In the resonance tone generation apparatus 20, the key numbers n are assigned. The resonance tone generation apparatus 20 has a plurality of resonance tone generation circuits 30(n) each being configured to have a plurality of resonance frequencies and each retrieving a musical tone signal indicative of a musical sound of the piano and generating a musical tone signal indicative of a resonance tone which imitates a sound of strings of the piano, the sound being resonated by the piano sound indicated by the retrieved musical tone signal. The resonance tone generation apparatus 20 also has a resonance circuit setting portion 60 which allows respective resonance frequencies of the resonance tone generation circuit 30(n) to coincide with frequencies of a fundamental tone and overtones of a musical sound PS(n) generated by the tone generator in accordance with tone generation instruction information including the key number n.

主权项

1. A resonance tone generation apparatus applied to an electronic musical instrument having a tone generator which generates a musical tone signal indicative of a musical sound which has a tone pitch specified by a tone pitch number and is generated by a polyphonic musical instrument by vibrating a vibrating body corresponding to the tone pitch number, in accordance with a tone generation instruction signal including the tone pitch number, the resonance tone generation apparatus comprising:
a plurality of resonance tone generation portions each of which is assigned a different tone pitch number and is configured to have a plurality of resonance frequencies, each of the plurality of resonance tone generation portions retrieving a musical tone signal indicative of a musical sound of the polyphonic musical instrument and generating a musical tone signal indicative of a resonance tone imitating a tone of a vibrating body of the polyphonic musical instrument resonated by the musical sound of the polyphonic musical instrument indicated by the retrieved musical tone signal; and a resonance frequency setting portion for allowing respective resonance frequencies of the each resonance tone generation portion to coincide with frequencies of a fundamental tone and overtones of the musical sound generated by the tone generator in accordance with tone generation instruction information including the tone pitch number assigned to the each resonance tone generation portion.