Kabushiki Kaisha Kawai Gakki Seisakusho

Eiji Matsuda

Gen Izumisawa

Hiroshi Kitagawa

Jiro Tanaka

Tsutomu Saito

Toshinori Matsuda

Tetsuya Hirano

Tsuyoshi Koike

A musical sound signal generation apparatus for producing a sound corresponding to an operated key can produce a sound of a newly-operated key even if all the musical sound signal generation means for generating a musical sound signal are in use. On producing the new sound, the apparatus prevents the players and the audience from having a sense of incongruity derived from the change in sound production. Especially, when a chord has been produced, it can maintain the state of chord production normally.

Musical sound signal generation apparatus

An electronic musical instrument reads data of a musical tone from a waveform memory thereof according to pitch information input thereto, to form a tone signal containing a tone amplitude signal indicative of amplitude of the musical tone. The tone signal is passed into a plurality of signal paths to be formed into a plurality of analog tone signals. The plurality of signals paths each amplify the tone amplitude signal according to a note on/off velocity, and attenuate a plurality of modifications of the tone signal, depending on or not depending on the note on/off velocity and the pitch information on the musical tone, to generate a musical tone suitably reflecting the note on/off velocity and the pitch.

Electronic keyboard musical instrument capable of varying a musical tone

An electronic musical instrument changes sound effects, such as resonance and reverberation, during a performance. The instrument has a tone-ON channel counter, for counting keys that are simultaneously depressed; an output channel determination unit, for determining an output channel in consonance with a count value held by the tone-ON channel counter; and an output channel selector, for designating the output channel, so as to provide a desired sound effect through the selected output channel. In a modification, the instrument has a parameter value determination unit, for determining a parameter value in consonance with a count value counted by the tone-ON channel counter; a resonant tone production unit, for adding a desired sound effect; and a controller, for employing the parameter value to control the resonant tone production unit. In a further modification, the instrument has an effect addition unit, for adding sound effects in consonance with a parameter value designated by the parameter value determination unit and the resonant tone production unit.

Electronic musical instrument altering tone sound effects responsive to

An electronic musical instrument having a plurality of switches is disclosed wherein a numerical value can be inputted without provision of a specific switch for inputting a numerical value. The electronic musical instrument has a tone/effect inputting mode in which, when one of the switches is operated, a tone or acoustic effect allocated in advance to the operated switch is set and a numeric inputting mode in which, when one of the switches is operated, a numerical value allocated in advance to the operated switch is set. A change-over switch is provided for changing over the operation mode between the tone/effect inputting mode and the numeric inputting mode.

Electronic musical instrument with numeric inputting function

A electronic keyboard instrument for producing an artificial sound, including a plurality of keys; waveform-forming structure for generating a signal indicative of a waveform of an artificial sound corresponding to one of the keys, when the one of the keys is depressed; at least one operating element; detecting structure for detecting whether or not the at least one operating element is being operated; and waveform-modifying structure for modifying the signal indicative of the wave form depending on results of detection by the detecting structure, the waveform-modifying structure including envelope-determining structure for determining an envelope of the wave form of the artificial sound, and envelope-modifying structure for outputting a modification value used in changing an output from the envelope-determining structure depending on results of detection by the detecting structure.

Electronic keyboard instrument

A tone signal generating apparatus, including a memory for storing wave data containing frequency components within a full band; a tone generator for reading the wave data from the memory in accordance with key ON/OFF data to generate a tone signal; a velocity generator for generating a velocity value based on key ON/OFF data; a first coefficient processor for producing a first coefficient to control the amplitude in accordance with the velocity value generated by the velocity generator; a first operator for performing an operation on the first coefficient produced by the first coefficient processor and the tone signal generated by the tone generator, a filter for extracting frequency components within a specific band from the tone signal output from the first operator to produce a first tone signal and outputting the first tone signal; a second coefficient processor for producing a second coefficient to control the amplitude in accordance with the velocity value generated by the velocity generator; and a second operator for performing an operation on the second coefficient produced by the second coefficient processor and the tone signal produced by the tone generator to obtain a second tone signal and outputting the second tone signal.

Tone signal generating apparatus for performing a timbre change by

A key assigner for an electronic musical instrument having multiple tone channels for tone signals generated by tone signal generator means controlled by a tone signal generation instruction input device. The key assigner includes a random access memory having an assignment table for storing priority level value data for each of the multiple tone channels for controlling the order in which musical tone signals present in the tone channels are halted when new tone signals are to be generated. An assigner halts the existing tone signal for the tone channel having the lowest priority level value in the assignment table upon the generation of a new tone signal instruction and assigns the new musical tone signal to that tone channel. A control provides priority level value data for storage in the memory in consonance with musical attribute data for the new musical tone, such as sustainment or attenuation of the new tone.

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Shizuoka, Japan

Eiji Matsuda