# US 8,785,759 B2 · Electric keyboard musical instrument, method executed by the same, and storage medium

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- Number: US 8,785,759 B2
- Document ID: US8785759B2
- Status: Granted
- Kind: B2
- Application number: 13/919,963
- Filed: 2013-06-17
- Published: 2014-01-02
- Granted: 2014-07-22
- Earliest claimed: 2012-06-27
- Assignees: Casio Computer Co., Ltd.
- Applicants: Casio Computer Co., Ltd.
- Inventors: Hiroshi Iwase; Tomomi Notsu
- Web page: https://patentgrep.com/patent/US8785759B2

## CPC

- G10H 1/18: Selecting circuits
- G10H 1/0066: {using a MIDI interface}
- G10H 2240/325: Synchronizing two or more audio tracks or files according to musical features or musical timings
- G10H 2250/041: Delay lines applied to musical processing
- 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

## Abstract

An electric keyboard musical instrument 10 includes: keys 32; third switches 36 that detect that the keys 32 are pressed down to a position x3; various switches 12 to 15 that receive a selection of a kind of tone; and a CPU 21 that executes generating a sound with a tone of the kind received by various switches 12 to 15 in response to the third switch 36 detecting that a key 32 is pressed down to a position x3. The CPU 21 changes a time from when the third switch 36 detects that a key 32 is pressed down to position x3 until sound generation is executed, according to a kind of tone received through the various switches 12 to 15.

## Claims

### Claim 1

An electric keyboard musical instrument comprising:
a keyboard including a plurality of keys;
a detection unit that detects that any one of the plurality of keys has been pressed;
a selection unit that selects a tone of a musical sound to be generated from among a plurality of tones;
a determination unit that determines a sound generation delay time from among a plurality of sound generation delay times, in accordance with the tone selected by the selection unit; and
a sound generation instruction unit that instructs a sound source to generate a musical sound of the tone selected by the selection unit, after the lapse of the sound generation delay time determined by the determination unit from a time at which pressing of a key was detected by the detection unit;
wherein the detection unit is configured such that:
in a case in which a predetermined tone is selected by the selection unit, pressing of a key is detected when the key is pressed to a first position; and
in a case in which a tone other than the predetermined tone is selected by the selection unit, pressing of a key is detected when the key is pressed to a second position.

### Claim 2 (depends on 1)

The electric keyboard musical instrument according to claim 1, further comprising:
a table that stores sound generation delay times for each of the plurality of tones,
wherein the determination unit includes a retrieval unit that retrieves, from the table, a sound generation delay time corresponding to the tone selected by the selection unit.

### Claim 3

A method executed by an electric keyboard musical instrument including a plurality of keys, the method comprising:
detecting that any one of the plurality of keys has been pressed;
selecting a tone of a musical sound to be generated from among a plurality of tones;
determining a sound generation delay time from among a plurality of sound generation delay times, in accordance with the selected tone; and
instructing a sound source to generate a musical sound of the selected tone, after the lapse of the determined sound generation delay time from a time at which pressing of a key was detected;
wherein the detecting is performed such that:
in a case in which a predetermined tone is selected, pressing of a key is detected when the key is pressed to a first position; and
in a case in which a tone other than the predetermined tone is selected, pressing of a key is detected when the key is pressed to a second position.

### Claim 4 (depends on 3)

The method according to claim 3, wherein the electric keyboard musical instrument further includes a table that stores sound generation delay times for each of the plurality of tones, and the determining comprises retrieving, from the table, a sound generation delay time corresponding to the selected tone.

### Claim 5

A non-transitory computer-readable storage medium storing a computer-readable program that enables a computer used as an electric keyboard musical instrument having a keyboard including a plurality of keys to execute functions comprising:
detecting that any one of the plurality of keys has been pressed;
selecting a tone of a musical sound to be generated from among a plurality of tones;
determining a sound generation delay time from among a plurality of sound generation delay times, in accordance with the selected tone; and
instructing a sound source to generate a musical sound of the selected tone, after the lapse of the determined sound generation delay time from a time at which pressing of a key was detected;
wherein the detecting is performed such that:
in a case in which a predetermined tone is selected, pressing of a key is detected when the key is pressed to a first position; and
in a case in which a tone other than the predetermined tone is selected, pressing of a key is detected when the key is pressed to a second position.

### Claim 6 (depends on 5)

The storage medium according to claim 5, wherein the electric keyboard musical instrument further includes a table that stores sound generation delay times for each of the plurality of tones, and the determining comprises retrieving, from the table, a sound generation delay time corresponding to the selected tone.