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EP0280069A1
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Audio synthesis method and electronic musical instrument for its implementation
Assignee: Individual
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Filing: 1988-02-02
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Granted: —
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Expires: 2008-02-02
Abstract
Abstract The invention concerns a method of audio synthesis wherein numerical samples memorized in a sample memory are reconstructed. The samples are memorized in the sample memory in the form of a plurality of sample packages, and each package corresponds to a distinct sound event. The sample packages are read out one after the other in accordance with a predetermined linking of the packages. The selection and linking of the sound events is determined in a dependence upon an audio signal to be produced. The invention is particularly suited for high quality musical instruments.
Inventors
- 👤 Christian Jacques Deforeit
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 18:55
CPC Classifications
G; G10; G10H; G10H7/00; G10H7/02; G10H2240/00; G10H2240/121; G10H2240/145
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
A method of audio synthesis including the step of successive reading of numerical samples memorized in a sample memory and the step of restituting said samples in analog format, wherein - said samples are memorized in said sample memory in a plurality of sample packages, each sample package corresponding to a distinct sound event, -said sample packages are read successively in accordance with a predetermined package linking, - said package linking is written into a linking table containing a list of sound events to be successively produced, - selection and linking of sound events are written into said linking table in dependence upon a sound signal to be produced.
Claim 2
Independent Claim
109 words
A method of audio synthesis including the step of successive reading of numerical samples memorized in a sample memory and the step of restituting said samples in analog format, wherein - said samples are memorized in said sample memory in a plurality of sample packages, each sample package corresponding to a distinct sound event, -said sample packages are read successively in accordance with a predetermined package linking, - said package linking is written into a linking table containing a list of sound events to be successively produced, - selection and linking of sound events are written into said linking table in dependence upon a sound signal to be produced.
Claim 3
Dependent Claim
27 words
The method of claim 1 wherein said linking table comprises a plurality of entries corresponding to a plurality of restitution types of a sound to be produced.
Claim 4
Dependent Claim
132 words
An electronic musical instrument for implementation of the method defined in claim1 or 2, comprising: - a numerical sample memory, divided into memory blocks, each block adapted to memorize at least one sample package corresponding to a respective sound event, - means for reading and numerical-to-analog converting of samples read out of said sample memory, said means including a phase counter for addressing successive samples of a sample package, - a linking memory for global addressing of sample packages, - synchronizing means for pointing said linking to another memory block after reading of a last sample in each block, and - a central control unit for writing into said linking memory at least a list of sample packages and for control of the successive reading of samples and production of predetermined sounds.
Claim 5
Dependent Claim
78 words
The instrument of claim 3 wherein said linking device comprises an address selection table containing at least a common address portion of samples of each sample block, and a linking memory containing at least a list of sample blocks which constitute a linking, each element of said list serving the addressing of said selection table, and each address portion delivered by said address selection table being combined with the count of said phase counter for addressing each sample.
Claim 6
Dependent Claim
39 words
The instrument of claim 4 comprising further a linking pointer register connected to said linking memory for obtaining repeated readings of sample blocks or of sample block groups in response to said linking list contained in said linking memory.
Claim 7
Dependent Claim
106 words
The instrument of claim 5 for generation of polyphonic sounds wherein said phase counter comprises a phase register and an adding circuit, and wherein the instrument comprises an assembly of memory blocks for each signal to be generated, each assembly including said phase register, said linking pointer register and further an amplitude register, a period register, an instant-of-happening register and a block linking register, and means for counting the time and means for comparing the elapsed time with the contents of the instant-of-happening register of each assembly so as to produce the samples of each signal in multiplexed format by linking the read-out of block assemblies.
References Cited (Backward Citations)
WO1981003236A1
Cited
GB2137399A
Cited
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