Kabushiki Kaisha Kawai Gakki Seisakusho

Kabushiki Kaisha Somic Ishikawa

Sanyo Denki Kabushiki Kaisha

Tokyo Sanyo Denki Kabushiki Kaisha

Hiroshi Kato

Yoshiro Nakayama

Koji Tanaka

Yasuhiko Okuyama

Tsutomu Saito

Toshio Mishima

Tadayuki Ishida

Youichi Kondo

Kohji Tanaka

A range control system includes an input section for inputting a singing voice, a fundamental frequency extracting section for extracting a fundamental frequency of the inputted voice, and a pitch control section for performing a pitch control of the inputted voice so as to match the extracted fundamental frequency with a given frequency. The system further includes a formant extracting section for extracting a formant of the inputted voice, and a formant filter section for performing a filter operation relative to the pitch-controlled voice so that the pitch-controlled voice has a characteristic of the extracted formant. The system further includes an input loudness detecting section for detecting a first loudness of the inputted voice, and a loudness control section for controlling a second loudness of the voice subjected to the filter operation to match with the first loudness. The system further includes a music information storing section storing musical information of songs to be sung, and an automatic reproducing section for reading musical information of a selected song and outputting melody information, accompaniment information and various acoustic effect information of the selected song included in the musical information.

Range control system

An intermediate molding ( ) is formed so that a cylindrical arm-to-be portion ( ) projects from the cylindrical outer surface of a body portion ( ) of the arm-to-be portion ( ). The arm-to-be portion ( ) has a given thickness and a hole ( ) with a diameter greater than the inner diameter of a projecting connector portion ( ) of an arm portion ( ). A pair of flat face portions ( ) extending parallel to the axis of the body portion ( ) are formed on the cylindrical outer surface of the arm-to-be portion ( ). A tap ( ) that has an external thread ( ) formed along its cylindrical outer surface is inserted into the hole ( ) of the arm-to-be portion ( ). Concave faces ( ),( ) are concaves respectively formed on the opposing surfaces of an upper die ( ) and a lower die ( ) so as to have a shape like a half cylinder with a curvature corresponding to that of the cylindrical outer surface of the projecting connector portion ( ). The concave faces ( ),( ) sandwich and apply pressure to the arm-to-be portion ( ), thereby narrowing the arm-to-be portion ( ) and forming an internal thread ( ) in the cylindrical outer surface of the hole ( ) of the arm-to-be portion ( ). With the tap ( ) being removed while being rotated, formation of the arm portion ( ) is completed. Compared with a method that calls for forming an internal thread ( ) by threading with an external thread ( ) of the tap ( ), the method of the invention enables the easier and quicker formation. The invention also prevents wear of the tap ( ) and enables the easy formation of the projecting connector portion ( ) of the arm portion ( ) having stable characteristics and a desired internal thread ( ).

Method of manufacturing ball joint

An electronic musical instrument has a tone generation instruction operation member for instructing to start tone generation, and a tone generation control unit for starting a tone generation process upon operation of the tone generation instruction operation member, continuing the tone generation process even after the tone generation instruction operation member is released, and executing a mute process when the identical tone generation instruction operation member is operated again.

Electronic musical instrument with mute control

A tone source circuit for electronic musical instruments which enables the selection of a desired one of a plurality of waveshapes of different duty ratios and is suitable for fabrication as an integrated circuit. The tone source circuit is composed of a tone signal generator for producing a tone signal of a frequency corresponding to each tone, a frequency divider group for frequency dividing the tone signal to a plurality of stages in a sequential order, a waveshape forming circuit for obtaining a plurality of waveshapes of different duty ratios from output signals of the frequency dividing stages of the frequency divider group and/or a feet select circuit for selecting a plurality of combinations of frequency dividing stages of the frequency divider group, waveshape select means for selecting a desired waveshape from the plurality of waveshapes of different duty ratios and means for selectively deriving a signal of the selected waveshape in response to key depression.

Tone source for an electronic musical instrument

An automatic accompaniment apparatus which has an auto-bass circuit and an auto-arpeggio circuit. In the auto-bass circuit, note information concerning one kind of code is stored in a memory (ROM), and a code signal is detected from depressed key information in a code detector, and in a note converter a note signal from the memory is converted by the code signal to a note signal corresponding to the kind of code, whereby note signals of various kinds of codes are generated. In the auto-arpeggio circuit, note information concerning one kind of code is stored in a memory (ROM), and a code signal is detected from depressed key information in a code detector, and in a note converter a note signal from the memory is converted by the code signal to a note signal corresponding to the kind of code. The note signal is added with a root signal from the code detector, and by the added output, a scale signal is selectively obtained, which scale signal is frequency divided by an octave signal from the memory. Thus, various kinds of codes ranging over several octaves are obtained.

Automatic accompaniment apparatus

A keyboard type electronic musical instrument wherein tone assignment signals (key depression signals) designated by depressing desired keys of keyboards are transmitted to an electronic circuit block through only one signal line per sort of keyboard as time-divided serial timing signals. The electronic circuit block includes therein a circuit which generates parallel output signals having respectively different timings in correspondence with notes of the keyboards. The parallel timing signals are respectively sent to the corresponding key switches of the keyboards, they are selected by turning 'on' the switches, and they are converted by OR circuits into serial timing signals representative of the selected notes. The serial timing signals are sent to a device for detecting and storing notes or chords, whereupon as in prior arts, a tone signal is generated from the obtained signal indicative of a note or chord by tone signal producing device and it is amplified and provided as an output by a loudspeaker. This time-division control system is applicable to electronic musical instruments having any desired forms of keyboards.

Keyboard type electronic musical instrument

A keyboard type automatic accompanying system wherein information representative of the root note of a chord and the type thereof are detected from key depression signals assigned by depressing a plurality of desired keys of an accompanying keyboard, the detected information are stored, and an automatic chord complying with the particular chord are accompanied. A chord detector comprises in combination a shift register which stores the accompanying key assignment signals therein and which shifts the stored contents cyclically, and a ROM device in which binary information indicative of the basic forms of chord names and the types of chords are stored. Outputs of the shift register are applied to the ROM device, and the type and the root note of the chord are detected in one shift cycle of the shift register, so that the circuit arrangement is simplified, that the detecting time is shortened and that the key response rate is enhanced. On the basis of the information representative of the root note of the chord and the type thereof, an auto-chord tone assignment signal is formed by an ACC signal generator. The signal is timed in a chord tone generator by a rhythm pulse transmitted from a rhythm pulse generator, and becomes an automatic chord accompanying tone signal. The tone signal is amplified by an amplifier and provided as an output by a loudspeaker.

Keyboard type automatic accompanying system

An automatic musical instrument in which a chord discrimination and a musical performance circuit are arranged so that a comparator with multiple input terminals on one side, is connected to a memory circuit having multiple basic types of chords memorized. The comparator has multiple input terminals on the other side connected to key switches through a shift register. The comparator, furthermore, has a control electrode connected to a clock pulse generator which is connected, in turn, to multiple input terminals of the memory circuit, by way of two counter circuits. The latter have multiple output terminals connected, respectively, to two latch circuits. The comparator has an output terminal connected to control electrodes of the latch circuits. The musical performance circuit has a decoder connected to multiple output terminals of one of the latch circuits.

Automatic musical instrument

An arrangement for forming a musical chord signal in which there are provided a frequency divider for root, a frequency divider for minor third, a frequency divider for major third and a frequency divider for fifth or a frequency divider for seventh. These are connected in common and to an input terminal of a tone source signal. The frequency divider for minor third and the frequency divider for major third have a selection circuit for selectively taking out an output signal according to a major chord or a minor chord of music. The input terminal is connected through plural key-switches to the plural tone source signal oscillators. The output terminals of the frequency divider for root, the selective circuit and the frequency divider for fifth or the frequency divider for seventh are connected together through respective gate circuits which are opened and closed by an output pulse signal of a rhythm pulse generator.

Growing community of inventors

Ageo, Japan

Hiroshi Kato