Satoshi Usa

Electronic musical instrument with vibration feedback

A vibrator for vibrating an electronic musical instrument in accordance to the generated tone being produced. In this manner, a player of the electrical musical instrument will have the sensation of playing a conventional musical instrument due to the feedback of vibrational energy into the input device of the electronic musical instrument.

Method and apparatus for controlling an electronic musical instrument using fuzzy logic

Tone control of an electronic musical instrument is provided using fuzzy inferences for determining musical tone control parameters such as pitch, sounding level, effect, overtone composition, playing methods, etc. Several different kinds of play information are derived from controls operated by the performer and selectively taken into account using fuzzy inference rules to derive the musical tone control parameters. Several different types of play information, such as initial touch, after touch, key-on time, etc., may thus be combined to provide delicate nuances to the musical performance providing a more natural sounding tone and providing the capability to give the musical tone an expression corresponding to a method or technique of a musical performance.

Musical-tone control apparatus with means for inputting a bowing velocity signal

In order to simulate sounds of an acoustic musical instrument such as a bowed stringed instrument, an electronic musical instrument employs a musical tone control apparatus which at least contains an operating device and a detecting circuit. Herein, when operating the operating device which can be operated in a two-dimensional area, the detecting circuit detects operation information corresponding to an operating position or an operating displacement of the operating device. Then, velocity information is generated based on the operation information. Thereafter, a musical tone is generated in response to a musical characteristic corresponding to the velocity information under a condition where the operating device is now operating. Preferably, the operating device is configured by a digitizer on which surface an electronic pen is moved two-dimensionally by the performer. Thus, it is possible to impart the varied performance expression to the musical tone to be generated.

Method and apparatus for controlling sound source for electronic musical instrument

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.

Electronic musical instrument of rubbed string simulation type

Disclosed is an electronic musical instrument which comprises: manipulator for defining a manipulation region of at least one dimension and for achieving performance manipulation within the manipulation region; position detector for detecting the position of performance manipulation within the manipulation region; arithmetic operation unit for calculating information pertaining to the direction and velocity of movement from the time change of the position of performance manipulation; tone signal generator for generating a tone signal using the information pertaining to the direction and velocity information as a parameter of controlling the tone signal; and latch unit for latching information pertaining to at least one of the direction and velocity of the movement, wherein the tone signal generator generates a tone signal using said information latched by the latch unit when the latch unit is operated. Whereby, information pertaining to the manipulation of the performance manipulator against players will can be neglected by the players will and a continuous tone can be generated as desired.

Electronic musical tone controller with fuzzy processing

An electronic musical tone controller having an input operator for inputting a degree of a sensory expression representing the quality of a musical tone and generating an input parameter, a controller for controlling an electrical parameter and a circuit parameter for controlling a waveform of a signal of the musical tone, a musical tone signal generator for generating a signal of the musical tone in accordance with the electrical parameter and the circuit parameter, and a logical calculation unit for performing a fuzzy calculation and generating an output parameter for controlling the electrical parameter and the circuit parameter, by using the input parameter generated by the input operator unit.

Electronic musical instrument having a portamento function utilizing whole and half transformations

A keyboard and a portamento bar are connected to a tone generator through a common channel assigner to use each tone generating channel either for generating a keyboard sound or for generating a portamento sound. Thus, a portamento sound can be generated without a need for providing a another tone generator. Further, such arrangement is provided that can shift the tone generation from a keyboard sound to a portamento sound and from a portamento sound to a keyboard sound, enabling initiation and termination of a portamento performance to have accurate pitches.

Electronic musical instrument having artificial string sound source with bowing effect

An electronic musical instrument has an electronic sound source of a physical model simulating the sound mechanism of an acoustic mechanical instrument, in particular, a stringed instrument of the bowing type. The electronic sound source is controlled according to tone pitch information and tone information determining a characteristic of a musical tone to be generated. A keyboard is provided as a data input device by which tone pitch is designated and on which a performance manner is expressed via initial touch and after touch. A memory stores two sets of performance information, each set containing bowing force and bowing velocity information. An interpolating unit operates to access the memory for carrying out interpolation between the two sets of performance information according to the performance manner, and produces respective interpolated performance information regarding bowing force and bowing velocity information effective to control the artificial sound source. The electronic sound source is also controlled by the interpolated performance information.

Electronic musical instrument adapted to simulate a rubbed string instrument

The electronic musical instrument, which is suitable for generating sustaining tone of a rubbed string instrument, has a manipulator for achieving performance manipulation in a linear manipulation region or in a plane manipulation region to simulate the motion of a bow of the rubbed string instrument, and a processing circuit for applying smoothing treatment to signals given by the manipulator. The musical tone generated by the electronic musical instrument can be prevented from being contaminated with discordant sound caused by noise produced in performance manipulation.

A high time‐resolution pitch detector

A very high time‐resolution pitch detector is proposed. Pitch periods can be very exactly obtained from each pitch. In the frequency domain, the magnitude of second harmonic of voiced speech is 10 dB larger than the fundamental magnitude at most. Therefore the fundamental component is made into the strongest one through a 20‐dB/oct FIR low‐pass filter. Pitch periods can be obtained from the time interval of filtered voice peaks. The fundamental peaks of the time domain waveform are separated from other false peaks by the dynamic threshold which is defined by the moving average of filtered and half‐rectified voice. This method is very useful for analysis and/or processing which need exact pitch periods. In addition, since this method does not have an analysis time window, it has high performance for both high and low pitch speaker.