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US5998723A
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Apparatus for forming musical tones using impulse response signals and method of generating musical tones
Assignee: Kawai Musical Instruments Manufacturing Co Ltd
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Filing: 1998-09-30
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Granted: 1999-12-07
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Expires: 2018-09-30
Abstract
Abstract A desired tone signal is generated by the impulse response signals that are repetitively generated, and a tone is formed. Impulse response signals of a predetermined length corresponding to the frequency characteristics of the tone signal to be generated are repetitively generated. The recurring period of the impulse response signals repetitively generated varies depending upon a pitch-determining factor. The rate of generating the impulse response signals is changed depending upon a timbre-determining factor different from the pitch-determining factor, independently of the recurring period. Thus, the timbre of the tone signal formed from the impulse response signals is freely changed independently of the pitch.
Inventors
- 👤 Takashi Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:28
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/02; G10H1/06; G10H7/00; G10H7/002; G10H2240/00; G10H2240/171; G10H2240/281; G10H2240/311; G10H2250/00; G10H2250/131; G10H2250/161; G10H2250/215; G10H2250/235
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
96 words
An apparatus for forming musical tones comprising: means for repetitively generating impulse response signals of a predetermined length corresponding to frequency characteristics of a tone signal that is to be generated; means for changing a recurring period of the impulse response signals repetitively generated depending upon a pitch-determining factor; means for changing a rate of generating the impulse response signals depending upon a timbre-determining factor different from said pitch-determining factor, independently of said recurring period; and means for changing over a waveform of the impulse response signals that are repetitively generated depending upon a musical factor.
Claim 2
Independent Claim
96 words
An apparatus for forming musical tones comprising: means for repetitively generating impulse response signals of a predetermined length corresponding to frequency characteristics of a tone signal that is to be generated; means for changing a recurring period of the impulse response signals repetitively generated depending upon a pitch-determining factor; means for changing a rate of generating the impulse response signals depending upon a timbre-determining factor different from said pitch-determining factor, independently of said recurring period; and means for changing over a waveform of the impulse response signals that are repetitively generated depending upon a musical factor.
Claim 3
Dependent Claim
21 words
The apparatus for forming musical tones according to claim 1, wherein said pitch-determining factor determines a pitch of the tone signal.
Claim 4
Dependent Claim
21 words
The apparatus for forming musical tones according to claim 1, wherein said timbre-determining factor determines a timbre of the tone signal.
Claim 5
Dependent Claim
54 words
The apparatus for forming musical tones according to claim 1, wherein the impulse response signals are stored in a storage element, a rate of reading the impulse response signals is determined depending upon said timbre-determining factor, and the recurring period for repetitively reading the impulse response signals is determined depending upon said pitch-determining factor.
Claim 6
Dependent Claim
31 words
The apparatus for forming musical tones according to claim 1, wherein said musical factor determines a pitch of the tone signal, or is a timbre-determining factor different from said pitch-determining factor.
Claim 7
Independent Claim
112 words
An apparatus for forming musical tones comprising: means for generating impulse response signals of a predetermined length corresponding to frequency characteristics of a tone signal that is to be generated; means for controlling said means for generating impulse response signals so that the impulse response signals are repetitively generated with a predetermined period; means for continuously generating an impulse response signal at an end of the predetermined period when the impulse response signal is longer than the predetermined period and for generating a next impulse response signal in an overlapped manner; and means for changing over a waveform of the impulse response signals that are repetitively generated depending upon a musical factor.
Claim 8
Independent Claim
112 words
An apparatus for forming musical tones comprising: means for generating impulse response signals of a predetermined length corresponding to frequency characteristics of a tone signal that is to be generated; means for controlling said means for generating impulse response signals so that the impulse response signals are repetitively generated with a predetermined period; means for continuously generating an impulse response signal at an end of the predetermined period when the impulse response signal is longer than the predetermined period and for generating a next impulse response signal in an overlapped manner; and means for changing over a waveform of the impulse response signals that are repetitively generated depending upon a musical factor.
Claim 9
Dependent Claim
21 words
The apparatus for forming musical tones according to claim 6, wherein a pitch-determining factor determines a pitch of the tone signal.
Claim 10
Dependent Claim
21 words
The apparatus for forming musical tones according to claim 6, wherein a timbre-determining factor determines a timbre of the tone signal.
Claim 11
Dependent Claim
54 words
The apparatus for forming musical tones according to claim 6, wherein the impulse response signals are stored in a storage element, a rate of reading the impulse response signals is determined depending upon a timbre-determining factor, and a recurring period for repetitively reading the impulse response signals is determined depending upon a pitch-determining factor.
Claim 12
Dependent Claim
31 words
The apparatus for forming musical tones according to claim 6, wherein said musical factor determines a pitch of the tone signal, or is a timbre-determining factor different from a pitch-determining factor.
Claim 13
Independent Claim
88 words
A method of generating musical tones comprising: repetitively generating impulse response signals of a predetermined length corresponding to frequency characteristics of a tone signal that is to be generated; changing a recurring period of the impulse response signals repetitively generated depending upon a pitch-determining factor; changing a rate of generating the impulse response signals depending upon a timbre-determining factor different from said pitch-determining factor, independently of said recurring period; and changing over a waveform of the impulse response signals that are repetitively generated depending upon a musical factor.
Claim 14
Independent Claim
88 words
A method of generating musical tones comprising: repetitively generating impulse response signals of a predetermined length corresponding to frequency characteristics of a tone signal that is to be generated; changing a recurring period of the impulse response signals repetitively generated depending upon a pitch-determining factor; changing a rate of generating the impulse response signals depending upon a timbre-determining factor different from said pitch-determining factor, independently of said recurring period; and changing over a waveform of the impulse response signals that are repetitively generated depending upon a musical factor.
Claim 15
Dependent Claim
21 words
The method of generating musical tones according to claim 11, wherein said pitch-determining factor determines a pitch of the tone signal.
Claim 16
Dependent Claim
21 words
The method of generating musical tones according to claim 11, wherein said timbre-determining factor determines a timbre of the tone signal.
Claim 17
Dependent Claim
50 words
The method of generating musical tones according to claim 11, wherein the impulse response signals are stored, a rate of reading the impulse response signals is determined depending upon said timbre-determining factor, and the recurring period for repetitively reading the impulse response signals is determined depending upon said pitch-determining factor.
Claim 18
Dependent Claim
31 words
The method of generating musical tones according to claim 11, wherein said musical factor determines a pitch of the tone signal, or is a timbre-determining factor different from said pitch-determining factor.
Claim 19
Independent Claim
102 words
A method of generating musical tones comprising: generating impulse response signals of a predetermined length corresponding to frequency characteristics of a tone signal that is to be generated; controlling generation of the impulse response signals so that the impulse response signals are repetitively generated with a predetermined period; continuously generating an impulse response signal at an end of the predetermined period when the impulse response signal is longer than the predetermined period, and generating a next impulse response signal in an overlapped manner; and changing over a waveform of the impulse response signals that are repetitively generated depending upon a musical factor.
Claim 20
Independent Claim
102 words
A method of generating musical tones comprising: generating impulse response signals of a predetermined length corresponding to frequency characteristics of a tone signal that is to be generated; controlling generation of the impulse response signals so that the impulse response signals are repetitively generated with a predetermined period; continuously generating an impulse response signal at an end of the predetermined period when the impulse response signal is longer than the predetermined period, and generating a next impulse response signal in an overlapped manner; and changing over a waveform of the impulse response signals that are repetitively generated depending upon a musical factor.
Claim 21
Dependent Claim
21 words
The method of generating musical tones according to claim 16, wherein a pitch-determining factor determines a pitch of the tone signal.
Claim 22
Dependent Claim
21 words
The method of generating musical tones according to claim 16, wherein a timbre-determining factor determines a timbre of the tone signal.
Claim 23
Dependent Claim
50 words
The method of generating musical tones according to claim 16, wherein the impulse response signals are stored, a rate of reading the impulse response signals is determined depending upon a timbre-determining factor, and a recurring period for repetitively reading the impulse response signals is determined depending upon a pitch-determining factor.
Claim 24
Dependent Claim
32 words
The method of generating musical tones according to claim 16, wherein said musical factor determines a pitch of the tone signal, or is a timbre-determining factor different from said pitch determining factor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-12-06 | 2003-06-07 | 2003-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-12-06 | 2007-06-07 | 2007-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-12-06 | 2011-06-07 | 2011-12-07 | $7700.00 | Window Closed / Lapsed |