Electronic musical instrument, musical sound generating method of electronic musical instrument, and storage medium

Patent metadata

Field	Value
Publication number	US-10825438-B2
Application number	US-201816130278-A
Country	US
Kind code	B2
Filing date	Sep 13, 2018
Priority date	Sep 27, 2017
Publication date	Nov 3, 2020
Grant date	Nov 3, 2020

Abstract

An electronic musical instrument includes: a memory that stores, before performance of a musical piece on the electronic musical instrument by a performer begins, pitch variation data that represents differences between fundamental tone frequencies of notes in a melody of the musical piece and fundamental tone frequencies of notes in prescribed singing voice waveform data; and a sound source that outputs a pitch-adjusted carrier signal to be received by a waveform synthesizing device that generates synthesized waveform data based on the pitch-adjusted carrier signal, the pitch-adjusted carrier signal being generated on the basis of the pitch variation data acquired from the memory and performance instruction pitch data that represent pitches specified by the performer during the performance of the musical piece on the electronic musical instrument, the pitch-adjusted carrier signal being generated even when the performer does not sing after performance of the musical piece begins.

First claim

What is claimed is:

1. An electronic musical instrument comprising:
a memory that stores, before performance of a musical piece on the electronic musical instrument by a performer begins, pitch variation data that represents differences between fundamental tone frequencies of notes in a melody of the musical piece and fundamental tone frequencies of notes in prescribed singing voice waveform data, the prescribed singing voice waveform data representing or simulating a singing voice that is generated when a person actually sings the melody of the musical piece, and a plurality of pieces of amplitude data that represent characteristics of the singing voice generated on the basis of the prescribed singing voice waveform data and that respectively correspond to a plurality of frequency bands;
a sound source that outputs a pitch-adjusted carrier signal, the pitch-adjusted carrier signal being generated on the basis of the pitch variation data acquired from the memory and performance instruction pitch data that represent pitches specified by the performer during the performance of the musical piece on the electronic musical instrument, the pitch-adjusted carrier signal being generated even when the performer does not sing after performance of the musical piece begins; and
a waveform synthesizing device that receives the pitch-adjusted carrier signal and that generates synthesized waveform data based on the pitch-adjusted carrier signal, the waveform synthesizing device including a plurality of band pass filters for the plurality of frequency bands, respectively, each receiving the pitch-adjusted carrier signal, the waveform synthesizing device modifying the pitch-adjusted carrier signal that has passed through the plurality of band pass filters in accordance with the plurality of pieces of amplitude data acquired from the memory for the plurality of frequency bands, respectively, and adding the so modified pitch-adjusted carrier signals for the plurality of frequency bands together so as to generate and output the synthesized waveform data.

2. The electronic musical instrument according to claim 1 ,
wherein the memory further stores, before the performance of the musical piece by the performer begins, consonant amplitude waveform data generated on the basis of the prescribed singing voice waveform data, and
wherein the pitch-adjusted carrier signal is superimposed by consonant segment waveform data generated in accordance with the consonant amplitude waveform data.

3. The electronic musical instrument according to claim 2 , wherein the consonant amplitude waveform data stored in the memory is generated on the basis of amplitudes of segments of the prescribed singing voice waveform data where the fundamental tone frequencies of the tones were not detected.

4. The electronic musical instrument according to claim 1 , further comprising:
a microcomputer that reads out the pitch variation data from the memory as time elapses from when the performance of the musical piece begins.

5. The electronic musical instrument according to claim 1 , further comprising:
a microcomputer that reads out the pitch variation data from the memory as time elapses from when the performance of the musical piece begins,
wherein the microcomputer reads out the plurality of pieces of amplitude data for each of the plurality of frequency bands from the memory in accordance with a time corresponding to a running time of the musical piece timed from a point in time at which the performer starts the performance.

6. The electronic musical instrument according to claim 1 , wherein the prescribed singing voice waveform data stored in the memory is generated on the basis of a recorded actual singing voice of a person.

7. The electronic musical instrument according to claim 1 , wherein the prescribed singing voice waveform data stored in the memory is singing voice data output by a mechanism using a voice synthesis technology.

8. The electronic musical instrument according to claim 1 , further comprising a processor that generates adjusted pitch data on the basis of the pitch variation data acquired from the memory and the performance instruction pitch data that represent pitches specified by the performer during the performance of the musical piece and that outputs the adjusted pitch data to the sound source,
wherein the sound source generates the pitch-adjusted carrier signal on the basis of the adjusted pitch data.

9. The electronic musical instrument according to claim 2 , further comprising a consonant waveform generator that receives the consonant amplitude waveform data and generates the consonant segment waveform data.

10. A method performed by an electronic musical instrument that includes:
a memory that stores, before performance of a musical piece on the electronic musical instrument by a performer begins, pitch variation data that represents differences between fundamental tone frequencies of notes in a melody of the musical piece and fundamental tone frequencies of notes in prescribed singing voice waveform data, the prescribed singing voice waveform data representing or simulating a singing voice that is generated when a person actually sings the melody of the musical piece, and a plurality of pieces of amplitude data that represent characteristics of the singing voice generated on the basis of the prescribed singing voice waveform data and that respectively correspond to a plurality of frequency bands;
a sound source; and
a waveform synthesizing device including a plurality of band pass filters for the plurality of frequency bands, respectively,
the method comprising:
causing the sound source to output a pitch-adjusted carrier signal generated on the basis of the pitch variation data acquired from the memory and performance instruction pitch data that represent pitches specified by the performer during the performance of the musical piece on the electronic musical instrument, the pitch-adjusted carrier signal being generated even when the performer does not sing after performance of the musical piece begins; and
causing the plurality of band pass filters of the waveform synthesizing device to receive the pitch-adjusted carrier signal, and causing the waveform synthesizing device to modify the pitch-adjusted carrier signal that has passed through the plurality of band pass filters in accordance with the plurality of pieces of amplitude data acquired from the memory for the plurality of frequency bands, respectively, and to add the so modified pitch-adjusted carrier signals for the plurality of frequency bands together so as to generate and output synthesized waveform data.

11. A non-transitory computer-readable storage medium having stored thereon a program executable by an electronic musical instrument that includes:
a memory that stores, before performance of a musical piece on the electronic musical instrument by a performer begins, pitch variation data that represents differences between fundamental tone frequencies of notes in a melody of the musical piece and fundamental tone frequencies of notes in prescribed singing voice waveform data, the prescribed singing voice waveform data representing or simulating a singing voice that is generated when a person actually sings the melody of the musical piece, and a plurality of pieces of amplitude data that represent characteristics of the singing voice generated on the basis of the prescribed singing voice waveform data and that respectively correspond to a plurality of frequency bands;
a sound source; and
a waveform synthesizing device including a plurality of band pass filters for the plurality of frequency bands, respectively,
the program causing the electronic music

Assignees

• Casio Computer Co Ltd

Inventors

• Iwase Hiroshi

Classifications

• G10H1/125

  using a digital filter · CPC title

• G10H7/04 Primary

  in which amplitudes are read at varying rates, e.g. according to pitch · CPC title

• G10H2250/455

  Gensound singing voices, i.e. generation of human voices for musical applications, vocal singing sounds or intelligible words at a desired pitch or with desired vocal effects, e.g. by phoneme synthesis · CPC title

• G10L19/00

  Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis (in musical instruments G10H) · CPC title

• G10H1/053

  during execution only {(voice controlled instruments G10H5/005)} · CPC title