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US 10,204,610 B2Granted
Musical note generation device, electronic musical instrument, method, and storage medium
AssigneeCasio Computer Co., Ltd.
InventorGoro Sakata
Life of this patent
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Abstract
A musical note generation device includes at least one processor, performing a process of generating convolved sound waveform data by convolving first sound waveform data corresponding to pitch information associated with a specified key with second sound waveform data corresponding to an impulse response; a process of generating third sound waveform data by respectively reducing, among frequency components included in the generated convolved sound waveform data, amplitudes of respective frequency components of a fundamental tone and harmonics of the fundamental tone corresponding to a pitch indicated by the pitch information; and a process of outputting piano sound waveform data generated on the basis of the generated third sound waveform data generated.
Claims11
A musical note generation device, comprising:
- a plurality of keys, the plurality of keys respectively being associated with pitch information;
- and
- at least one processor, the at least one processor performing processes including:
- a convolution operation process of generating convolved sound waveform data by convolving first sound waveform data corresponding to the pitch information associated with a specified key with second sound waveform data corresponding to an impulse response;
- a third sound waveform data generation process of generating third sound waveform data by respectively reducing, among frequency components included in the convolved sound waveform data generated by the convolution operation process, amplitudes of respective frequency components of a fundamental tone and harmonics of the fundamental tone corresponding to a pitch indicated by the pitch information;
- and
- an output process of outputting piano sound waveform data generated on the basis of the third sound waveform data generated by the third sound waveform data generation process,
- wherein in the third sound waveform data generation process, the at least one processor identifies the respective frequency components of the fundamental tone and the harmonics with a comb filter.
5 more elements
A method performed by at least one processor in an electronic musical instrument, comprising:
- a convolution operation process of generating convolved sound waveform data by convolving first sound waveform data corresponding to pitch information associated with a specified key with second sound waveform data corresponding to an impulse response;
- a third sound waveform data generation process of generating third sound waveform data by respectively reducing, among frequency components included in the convolved sound waveform data generated by the convolution operation process, amplitudes of respective frequency components of a fundamental tone and harmonics of the fundamental tone corresponding to a pitch indicated by the pitch information;
- and
- an output process of outputting piano sound waveform data generated on the basis of the third sound waveform data generated by the third sound waveform data generation process,
- wherein the third sound waveform data generation process includes identifying the respective frequency components of the fundamental tone and the harmonics with a comb filter.
2 more elements
A non-transitory storage medium having stored therein instructions that cause at least one processor in an electronic musical instrument to perform the following processes:
- a convolution operation process of generating convolved sound waveform data by convolving first sound waveform data corresponding to pitch information associated with a specified key with second sound waveform data corresponding to an impulse response;
- a third sound waveform data generation process of generating third sound waveform data by respectively reducing, among frequency components included in the convolved sound waveform data generated by the convolution operation process, amplitudes of respective frequency components of a fundamental tone and harmonics of the fundamental tone corresponding to a pitch indicated by the pitch information;
- and
- an output process of outputting piano sound waveform data generated on the basis of the third sound waveform data generated by the third sound waveform data generation process,
- wherein the third sound waveform data generation process includes identifying the respective frequency components of the fundamental tone and the harmonics with a comb filter.
2 more elements
A musical note generation device, comprising:
- a plurality of keys, the plurality of keys respectively being associated with pitch information;
- and
- at least one processor, the at least one processor performing processes including:
- an attenuated sound waveform data generation process of generating attenuated sound waveform data by respectively reducing, among frequency components included in first sound waveform data corresponding to the pitch information associated with a specified key, amplitudes of respective frequency components of a fundamental tone and harmonics of the fundamental tone corresponding to a pitch indicated by the pitch information;
- a convolution operation process of generating third sound waveform data by convolving the attenuated sound waveform data generated by the attenuated sound waveform data generation process with second sound waveform data corresponding to an impulse response;
- and
- an output process of outputting piano sound waveform data generated on the basis of the third sound waveform data generated by the convolution operation process,
- wherein the attenuated sound waveform data generation process includes identifying the respective frequency components of the fundamental tone and the harmonics with a comb filter.
5 more elements
A method performed by at least one processor in an electronic musical instrument, comprising:
- an attenuated sound waveform data generation process of, when a damper pedal is depressed, generating attenuated sound waveform data by reducing, among frequency components included in first sound waveform data corresponding to pitch information associated with a specified key, amplitudes of respective frequency components of a fundamental tone and harmonics of the fundamental tone corresponding to a pitch indicated by the pitch information;
- a convolution operation process of generating third sound waveform data by convolving the attenuated sound waveform data generated by the attenuated sound waveform data generation process with second sound waveform data corresponding to an impulse response;
- and
- an output process of outputting piano sound waveform data generated on the basis of the third sound waveform data generated by the convolution operation process,
- wherein the attenuated sound waveform data generation process includes identifying the respective frequency components of the fundamental tone and the harmonics with a comb filter.
2 more elements
A non-transitory storage medium having stored therein instructions that cause at least one processor in an electronic musical instrument to perform the following processes:
- an attenuated sound waveform data generation process of, when a damper pedal is depressed, generating attenuated sound waveform data by reducing, among frequency components included in first sound waveform data corresponding to pitch information associated with a specified key, amplitudes of respective frequency components of a fundamental tone and harmonics of the fundamental tone corresponding to a pitch indicated by the pitch information;
- a convolution operation process of generating third sound waveform data by convolving the attenuated sound waveform data generated by the attenuated sound waveform data generation process with second sound waveform data corresponding to an impulse response;
- and
- an output process of outputting piano sound waveform data generated on the basis of the third sound waveform data generated by the convolution operation process,
- wherein the attenuated sound waveform data generation process includes identifying the respective frequency components of the fundamental tone and the harmonics with a comb filter.
2 more elements
Dependencies are inferred from the claim text.