Musical sound generation device

Patent metadata

Field	Value
Publication number	US-10475425-B2
Application number	US-201815920975-A
Country	US
Kind code	B2
Filing date	Mar 14, 2018
Priority date	Mar 23, 2017
Publication date	Nov 12, 2019
Grant date	Nov 12, 2019

Abstract

A musical sound generation device including a first memory having a plurality of storage areas where waveform data is read out and stored, a waveform generator which functions as a plurality of waveform generating sections each of which generates a waveform for emitting a sound by reading out waveform data from a selected storage area of the first memory; and a control processor which determines, when an instruction for sound emission is provided, a combination of a waveform generating section and a storage area to be used for the instructed sound emission, based on a status of reading waveform data from each storage area by each waveform generating section.

First claim

What is claimed is:

1. A musical sound generation device comprising:
a first memory having a plurality of storage areas where waveform data is read out and stored;
a waveform generator which functions as a plurality of waveform generating sections each of which generates a waveform for emitting a sound by reading out waveform data from a selected storage area of the first memory; and
a control processor which determines, when an instruction for sound emission is provided, a combination of a waveform generating section and a storage area to be used for the instructed sound emission, based on a status of reading waveform data from each storage area by each waveform generating section,
wherein each of the storage areas is configured such that waveform data stored therein can be simultaneously read out by at least one of the plurality of waveform generating sections, and
wherein when the instruction for sound emission is provided, the control processor selects, as a storage area to be used for the instructed sound emission, a storage area for which waveform data stored therein is not being read out by any of the plurality of waveform generating sections or a storage area for which a number of the plurality waveform generating sections which are reading out waveform data stored therein is smaller than a number of the plurality of waveform generating sections which are reading out waveform data stored in other ones of the storage areas.

2. The musical sound generation device according to claim 1 , wherein the control processor, when the instruction for sound emission is provided, selects a waveform generating section not emitting sound from among the plurality of waveform generating sections, as the waveform generating section to be used for the instructed sound emission.

3. A musical sound generation device comprising:
a first memory having a plurality of storage areas where waveform data is read out and stored;
a waveform generator which functions as a plurality of waveform generating sections each of which generates a waveform for emitting a sound by reading out waveform data from a selected storage area of the first memory; and
a control processor which determines, when an instruction for sound emission is provided, a combination of a waveform generating section and a storage area to be used for the instructed sound emission, based on a status of reading waveform data from each storage area by each waveform generating section,
wherein the control processor selects a storage area to be used for the instructed sound emission when the instruction for sound emission is provided, based on a number of waveform generating sections which have read out waveform data stored in the storage areas,
wherein the control processor manages the plurality of storage areas and the plurality of waveform generating sections such that the plurality of storage areas and the plurality of waveform generating sections are associated with each other in a one-to-one relation, and
wherein the control processor selects, as the waveform generating section to be used for the instructed sound emission, a waveform generating section corresponding to a storage area for which a number of waveform generating sections which are reading out waveform data stored therein is smaller than a number of waveform generating sections which are reading out waveform data stored in other ones of the storage areas, when the instruction for sound emission is provided.

4. The musical sound generation device according to claim 1 , further comprising:
a second memory having stored therein a plurality of waveform data to be transferred to the first memory,
wherein the control processor, when the instruction for sound emission is provided and waveform data to be used for the instructed sound emission is in the first memory, causes the selected waveform generating section to read out the waveform data stored in the first memory, and
wherein the control processor, when the waveform data for which the instruction for sound emission has been provided is not in the first memory, transfers the waveform data to be used for the instructed sound emission from the second memory to the determined storage area of the first memory, and then causes the determined waveform generating section to read out the transferred and stored waveform data.

5. A musical sound generation device comprising:
a first memory having a plurality of storage areas where waveform data is read out and stored;
a waveform generator which functions as a plurality of waveform generating sections each of which generates a waveform for emitting a sound by reading out waveform data from a selected storage area of the first memory;
a control processor which determines, when an instruction for sound emission is provided, a combination of a waveform generating section and a storage area to be used for the instructed sound emission, based on a status of reading waveform data from each storage area by each waveform generating section; and
a second memory having stored therein a plurality of waveform data to be transferred to the first memory,
wherein the control processor, when the instruction for sound emission is provided and waveform data to be used for the instructed sound emission is in the first memory, causes the selected waveform generating section to read out the waveform data stored in the first memory,
wherein the control processor, when the waveform data for which the instruction for sound emission has been provided is not in the first memory, transfers the waveform data to be used for the instructed sound emission from the second memory to the determined storage area of the first memory, and then causes the determined waveform generating section to read out the transferred and stored waveform data, and
wherein the control processor, when the waveform data to be used for the instructed sound emission is not in a storage area of the first memory associated with the selected waveform generating section and is in a storage area associated with another waveform generating section other than the selected waveform generating section, sets the storage area associated with the other waveform generating section as a link destination of the selected waveform generating section, and causes the selected waveform generating section to directly read out the waveform data stored in the storage area associated with the other waveform generating section so as to emit a sound.

6. A musical sound generation device comprising:
a first memory having a plurality of storage areas where waveform data is read out and stored;
a waveform generator which functions as a plurality of waveform generating sections each of which generates a waveform for emitting a sound by reading out waveform data from a selected storage area of the first memory;
a control processor which determines, when an instruction for sound emission is provided, a combination of a waveform generating section and a storage area to be used for the instructed sound emission, based on a status of reading waveform data from each storage area by each waveform generating section; and
a second memory having stored therein a plurality of waveform data to be transferred to the first memory,
wherein the control processor, when the instruction for sound emission is provided and waveform data to be used for the instructed sound emission is in the first memory, causes the selected waveform generating section to read out the waveform data stored in the first memory,
wherein the control processor, when the waveform data for which the instruction for sound emission has been provided is not in the first memory, transfers the waveform data to be used for the instructed sound emission from the second memory to the determined storage area of the first memo

Assignees

• Casio Computer Co Ltd

Inventors

• Sato Hiroki
• Kawashima Hajime

Classifications

• G10H2230/031

  Use of cache memory for electrophonic musical instrument processes, e.g. for improving processing capabilities or solving interfacing problems · CPC title

• G10H1/0008 Primary

  Associated control or indicating means · CPC title

• G10H2240/161

  Memory and use thereof, in electrophonic musical instruments, e.g. memory map · CPC title

• G10H1/0066 Primary

  using a MIDI interface · CPC title

• G10H1/32

  Constructional details · CPC title