Resonance tone generation apparatus and resonance tone generation program

Patent metadata

Field	Value
Publication number	US-9478203-B2
Application number	US-201514609284-A
Country	US
Kind code	B2
Filing date	Jan 29, 2015
Priority date	Jan 31, 2014
Publication date	Oct 25, 2016
Grant date	Oct 25, 2016

Abstract

A resonance tone generation apparatus 20 is applied to an electronic musical instrument DM having a tone generator for generating a musical tone signal indicative of a piano sound in accordance with a tone generation instruction signal having a key number n, and a plurality of output portions for externally outputting a musical tone signal. The resonance tone generation apparatus 20 has a plurality of resonance tone generation circuits 30 (n) each of which is assigned a different key number n, retrieves a musical tone signal indicative of a musical sound of the piano, generates a musical tone signal indicative of a resonance tone imitating a tone of a string of the piano resonated by the musical sound of the piano indicated by the retrieved musical tone signal, and supplies the generated musical tone signal to the plurality of output portions. Each of the resonance tone generation circuits 30 (n) has a resonance circuit 40 (n) which has a plurality of resonance frequencies corresponding to the assigned key number n, and generates a musical tone signal indicative of the resonance tone imitating the tone of the string of the piano resonated by the musical sound of the piano indicated by the retrieved musical tone signal, and a panning setting circuit 50 (n) which generates a plurality of musical tone signals which are to be supplied to the plurality of output portions, respectively, and each of which indicates a different resonance tone in which a tone volume of the resonance tone indicated by the musical tone signal generated by the resonance circuit 40 (n) is changed in accordance with the assigned key number, and supplies the generated musical tone signals to the plurality of output portions, respectively.

First claim

What is claimed is:

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, and a plurality of output portions for outputting a musical tone signal, the resonance tone generation apparatus comprising:
a plurality of resonance tone generation portions each of which is assigned a different tone pitch number of the electronic musical instrument, retrieves a musical tone signal indicative of a musical sound of the polyphonic musical instrument, generates a musical tone signal indicative of a resonance tone imitating a tone of the 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 supplies the generated musical tone signal to the plurality of output portions;
each of the plurality of resonance tone generation portions including:
a resonance portion having a plurality of resonance frequencies corresponding to the assigned tone pitch number, and generating a musical tone signal indicative of a resonance tone which imitates a tone of the corresponding 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 panning setting portion for generating a plurality of musical tone signals which are to be supplied to the plurality of output portions, respectively, and each of which indicates a resonance tone in which a tone volume of the resonance tone indicated by the musical tone signal generated by the resonance portion is changed in accordance with the assigned tone pitch number, and outputting the generated musical tone signals to the plurality of output portions, respectively.

2. The resonance tone generation apparatus according to claim 1 , wherein
a sound image of the resonance tone indicated by the musical tone signal generated by the resonance tone generation portions is localized at an identical position to a sound image of the musical sound of the polyphonic musical instrument, the musical sound being indicated by the musical tone signal generated by the tone generator in accordance with the tone generation instruction signal including the tone pitch number assigned to the corresponding resonance tone generation portion.

3. The resonance tone generation apparatus according to claim 1 , wherein
the tone generator is configured such that a sample value obtained by sampling a musical sound of the polyphonic musical instrument at a certain sampling period is concurrently supplied to the plurality of resonance tone generation portions as the musical tone signal;
the resonance portion includes:
a delay portion for sequentially retrieving the sample value from the tone generator, and retaining the retrieved sample value for a period of delay time specified in accordance with the assigned tone pitch number;
a phase shift portion for sequentially retrieving the sample value from the delay portion after a lapse of the delay time specified in accordance with the assigned tone pitch number since the supply of the sample value to the delay portion, and shifting a phase of each frequency component of a musical tone indicated by a series of the retrieved sample values; and
an adding portion for retrieving the sample value indicative of the musical tone whose phase has been shifted by the phase shift portion from the phase shift portion, adding the retrieved sample value to a sample value newly supplied from the tone generator, and supplying the added sample value to the delay portion; and
the panning setting portion retrieves the sample value retained by the delay portion, and supplies a plurality of sample values obtained by multiplying the retrieved sample value by a plurality of coefficients specified in accordance with the assigned tone pitch number to the plurality of output portions, respectively.

4. The resonance tone generation apparatus according to claim 3 , wherein
a period of time elapsed since the supply of the sample value which is to be retrieved by the panning setting portion of a first resonance tone generation portion included in the plurality of resonance tone generation portions to the delay portion of the first resonance tone generation portion is different from a period of time elapsed since the supply of the sample value which is to be retrieved by the panning setting portion of a second resonance tone generation portion included in the plurality of resonance tone generation portions to the delay portion of the second resonance tone generation portion.

5. The resonance tone generation apparatus according to claim 3 , wherein
the panning setting portion receives a first sample value which is to be output from a first output portion included in the plurality of output portions and a second sample value which is to be output from a second output portion included in the plurality of output portions from the delay portion; and
the period of time elapsed since the supply of the first sample value to the delay portion of a first resonance tone generation portion is different from the period of time elapsed since the supply of the second sample value to the delay portion of a second resonance tone generation portion.

6. The resonance tone generation apparatus according to claim 1 , wherein
the polyphonic musical instrument is a piano; and
the vibrating body is a string of the piano.

7. A computer program causing a computer incorporated in a resonance tone generation apparatus applied to an electronic musical instrument having a tone generator which generates, in accordance with a tone generation instruction signal including a tone pitch number, a musical tone signal indicative of a musical sound of a polyphonic musical instrument having a plurality of vibrating bodies each corresponding to a different tone pitch number, the musical sound having a tone pitch specified by the tone pitch number, the electronic musical instrument also having a plurality of output portions for externally outputting a musical tone signal, the computer program causing the computer to function as the resonance tone generation apparatus comprising:
a plurality of resonance tone generation portions each of which is assigned a different tone pitch number of the electronic musical instrument, retrieves a musical tone signal indicative of a musical sound of the polyphonic musical instrument, generates a musical tone signal indicative of a resonance tone imitating a tone of the 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 supplies the generated musical tone signal to the plurality of output portions;
each of the plurality of resonance tone generation portions including:
a resonance portion having a plurality of resonance frequencies corresponding to the assigned tone pitch number, and generating a musical tone signal indicative of a resonance tone which imitates a tone of the corresponding 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 panning setting portion for generating a plurality of musical tone signals which are to be supplied to the plurality of output portions, respectively, and each of which indicates a resonance tone in which a t

Assignees

• Yamaha Corp

Inventors

• Nakata Masafumi

Classifications

• G10H1/06 Primary

  Circuits for establishing the harmonic content of tones {, or other arrangements for changing the tone colour} · CPC title

• G10H2210/305

  Source positioning in a soundscape, e.g. instrument positioning on a virtual soundstage, stereo panning or related delay or reverberation changes; Changing the stereo width of a musical source · CPC title

• G10H1/0091 Primary

  Means for obtaining special acoustic effects (combined with modulation G10H1/043) · CPC title

• G10H1/08

  by combining tones (G10H1/14, G10H1/16 take precedence; chord G10H1/38) · CPC title

• G10H2250/061

  Allpass filters · CPC title