# US 2019/0172433 A1 · Control method and control device

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- Number: US 2019/0172433 A1
- Document ID: US20190172433A1
- Status: Published application
- Kind: A1
- Application number: 16/252,293
- Filed: 2019-01-18
- Published: 2019-06-06
- Earliest claimed: 2016-07-22
- Assignees: Yamaha Corporation
- Applicants: Yamaha Corporation
- Inventors: Akira MAEZAWA
- Web page: https://patentgrep.com/patent/US20190172433A1

## CPC

- G10H 1/0008: {Associated control or indicating means}
- G10G 1/00: Means for the representation of music
- G10G 3/04: using electrical means
- G10H 1/00: Details of electrophonic musical instruments
- G10H 1/361: {Recording/reproducing of accompaniment for use with an external source, e.g. karaoke systems}
- G10H 1/40: Rhythm
- G10H 2210/061: for extraction of musical phrases, isolation of musically relevant segments, e.g. musical thumbnail generation, or for temporal structure analysis of a musical piece, e.g. determination of the movement sequence of a musical work
- G10H 2210/066: for pitch analysis as part of wider processing for musical purposes, e.g. transcription, musical performance evaluation; Pitch recognition, e.g. in polyphonic sounds; Estimation or use of missing fundamental
- G10H 2210/071: for rhythm pattern analysis or rhythm style recognition
- G10H 2210/391: Automatic tempo adjustment, correction or control
- G10H 2240/325: Synchronizing two or more audio tracks or files according to musical features or musical timings
- G10H 2250/015: Markov chains, e.g. hidden Markov models [HMM], for musical processing, e.g. musical analysis or musical composition
- G10H: ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10G: REPRESENTATION OF MUSIC; RECORDING MUSIC IN NOTATION FORM; ACCESSORIES FOR MUSIC OR MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR, e.g. SUPPORTS (music stands A47B; non-musical aspects of musical toy instruments A63H5/00; metronomes G04F5/02; teaching music G09B15/00)

## Abstract

A control method includes receiving a detection result relating to a first event in a performance; changing a following degree in a middle of the performance to which a second event in the performance follows the first event; and determining an operating mode of the second event based on the following degree.

## Claims

### Claim 1

A control method comprising:
receiving a detection result relating to a first event in a performance;
changing a following degree in a middle of the performance to which a second event in the performance follows the first event; and
determining an operating mode of the second event based on the following degree.

### Claim 2 (depends on 1)

The control method according to claim 1, wherein
in the changing of the following degree, a length of time from a time at which the changing of the following degree is started to a time at which the changing of the following degree is ended is longer than a prescribed length of time.

### Claim 3 (depends on 1)

The control method according to claim 1, wherein
the following degree is changed in accordance with a position of the performance in a musical piece.

### Claim 4 (depends on 1)

The control method according to claim 1, wherein
the following degree is changed in accordance with a user instruction.

### Claim 5

A control device comprising:
an electronic controller including at least one processor,
the electronic controller being configured to execute a plurality of modules including
a reception module that receives a detection result relating to a first event in a performance,
a changing module that changes a following degree in a middle of the performance to which a second event in the performance follows the first event, and
an operation determination module that determines an operating mode of the second event based on the following degree.

### Claim 6 (depends on 5)

The control device according to claim 5, wherein
the changing module changes the following degree such that a length of time from a time at which the changing of the following degree is started to a time at which the changing of the following degree is ended is longer than a prescribed length of time.

### Claim 7 (depends on 5)

The control device according to claim 5, wherein
the changing module changes the following degree in accordance with a position of the performance in a musical piece.

### Claim 8 (depends on 5)

The control device according to claim 5, wherein
the changing module changes the following degree in accordance with a user instruction.