Method and apparatus for controlling sound source for electronic musical instrument
AssigneeYamaha Corporation
InventorSatoshi Usa
Life of this patent
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Abstract
In controlling a sound source for an electronic musical instrument, operation data of a performance operation member corresponding to musical tone control parameters of a musical instrument is converted according to a tone generation region characteristic of the musical instrument. The tone generation region is approximated as a closed region defined by one or more curves. The converted data is inputted to a sound source circuit of the electronic musical instrument, so that a musical tone from pianissimo up to fortissimo can be generated sufficiently, while the musical tone approximates that of the musical instrument.
Claims14
A method for controlling a sound source in an electronic musical instrument, comprising the steps of:
- outputting at least two kinds of operation data of a performance operation member in correspondence with at least two musical tone parameters in a musical instrument, an operation range for the performance operation member including a first region corresponding to combinations of values of the operation data designated as a tone generation region and a second region corresponding to combinations of values of the operation data designated as a non-generation region, wherein a boundary between the tone generation region and the non-generation region is defined by one or more curves;
- converting the operation data outside of the tone generation region into values falling within the tone generation region;
- and
- inputting the converted operation data to the sound source, which generates a musical tone waveform signal in response to the converted operation data.
An apparatus for controlling a sound source of an electronic musical instrument, comprising:
- a performance operation means, performed by a player, for generating operation data in correspondence with musical tone parameters of a musical instrument;
- detecting means for detecting when the operation data falls outside a tone generation region defined by a relation between two or more of the musical tone parameters, the tone generation region defining a closed region having a boundary formed of one or more curves;
- a converting means, connecting to the performance operation means, for converting the detected operation data into values falling within the tone generation region;
- and
- sound source means, connecting to the converting means, for generating a musical tone waveform signal in response to the converted operation data.
An electronic musical instrument comprising:
- a sound source for generating a musical tone waveform signal in accordance with at least two input musical tone parameters;
- performance operation means for generating at least two operation signals corresponding to the musical tone parameter;
- signal correction means for converting the operation signals to values corresponding to a closed tone generation region defined by relationship between said at least two musical tone parameters, the tone generation region having one or more curves as its boundary, and then for inputting the converted operation signals to said sound source as the musical tone parameters;
- and
- volume control means for increasing or decreasing the amplitude of the musical tone waveform signal outputted from said sound source in accordance with the converted operation signal.
Dependencies are inferred from the claim text.