Nippon Gakki Seizo Kabushiki Kaisha

Yamaha Corporation

Takeshi Adachi

Masahiko Koike

Hideo Suzuki

Mamoru Kimpara

Akira Nakada

Masatada Wachi

Kotaro Mizuno

Toshiyuki Takahashi

Eiichiro Aoki

Satoshi Suzuki

Kosei Terada

Shigeru Yamada

Yasushi Kurakake

Eisaku Okamoto

Makoto Kaneko

Masashi Hirano

Yasuhiko Asahi

Takaaki Muto

Yoshihiro Inagaki

Masahiko Hasebe

Shigeru Suzuki

Kazuo Masaki

Naota Katada

Takaaki Mutoh

Kenji Itakura

Jun-ichi Mishima

Haruyuki Suzuki

An electronic musical instrument includes a key support portion, a plurality of keys pivotally supported on the key support portion, a musical tone signal generator, after sensors, and a musical tone signal control unit. The musical tone signal generator generates a musical tone signal corresponding to each of the plurality of keys. Each after sensor has a plurality of sensors and is arranged in correspondence with the plurality of keys and operated near key depression end positions to for independently generate pieces of key information. The musical signal control unit controls the musical tone signal generator on the basis of the key information.

Electronic musical instrument having key after-sensors and stroke

An acoustic control apparatus which can be applied to an electronic musical instrument controls the acoustics of a musical tone to be generated in response to variation of an image. In order to detect the variation of an image, the acoustic control apparatus extracts a predetermined image element from image information to be given thereto. This image element can be identified as movement of an image, color of image or an outline of image. The color of an image can be detected by detecting hue and/or number of colors in the image. In addition, in response to periodicity in variation of this image element, a performance tempo of musical tone can be controlled.

Acoustic control apparatus for controlling music information in response

An electronic musical instrument including a keyboard, a CPU and a sound source. The keyboard designates a pitch of a musical tone. The CPU detects common pitch data of one of predetermined series of pitch data or interval between predetermined two pitches, when a plurality of pitches are designated by the keyboard. The predetermined series of pitch data are stored in a memory in units of pitches which can be designated by the keyboard. The sound source outputs a musical tone signal having a pitch designated by the keyboard and musical tone signals having pitches indicated by the common pitch data detected by the CPU or having pitches corresponding to the interval detected by the CPU.

Electronic musical instrument having resonance tone generation

A desired offset value is set and difference between this offset value and touch data is obtained. A touch response control is performed in either of positive and negative directions. This difference data may be changed and adjusted by a desired touch sensitivity parameter. In a case where data used for a tone control is transferred from suitable reference data to control data corresponding to touch data, following interpolation from the reference data to the control data is made and a tone control is made in response to data obtained by this interpolation. In this case, coefficients for the following interpolation are caused to change gradually so that tone control data obtained by the interpolation will change smoothly. An abrupt change in a tone control signal thereby can be prevented and a touch response control which is not accompanied by unnaturalness can be realized.

Electronic musical instrument capable of controlling touch response

An acoustic control apparatus which can be applied to an electronic musical instrument controls the acoustics of a musical tone to be generated in response to variation of an image. In order to detect the variation of an image, the acoustic control apparatus extracts a predetermined image element from image information to be given thereto. This image element can be identified as movement of image, color of an image or an outline of image. The color of image can be detected by detecting hue and/or number of colors in the image. In addition, in response to periodicity in variation of this image element, a performance tempo of musical tone can be controlled.

Acoustic control apparatus for controlling musical tones based upon

The musical tone generating apparatus includes at least a waveform memory for storing waveform data, a stereophonic effect giving portion, left and right sound systems. The stereophonic effect giving portion gives stereophonic effect to the waveform data read from the waveform memory so that the left and right sound systems can generate left and right musical tones respectively based on the same waveform data outputted from the stereophonic effect giving portion. This stereophonic effect giving portion includes at least one digital filter whose filter coefficient can be adequately selected. This digital filter filters out the waveform data, and then the filtered waveform data are supplied to one of the left and right sound systems so that frequency characteristic of the left musical tone will be different from that of the right musical tone. Meanwhile, two digital filters can be provided at both inputs of the left and right sound systems.

Musical tone generating aparatus

A tone visualizing apparatus for visualizing an inputted audio signal to thereby display an image corresponding to this audio signal includes at least a detector, image display (such as a CRT display unit) and display controller. The detector detects characteristics of the audio signal such as envelope, chord, spectrum signal components, number of zero-cross points and energy of the audio signal. The image display displays an image based on given image information which can be generated from a video tape recorder (VTR), a video disk unit or an image memory constituted by a semiconductor memory. The display controller controls the image display so that a display parameter of the image will be controlled based on the detected characteristics of the audio signal. For example, the display parameter can be set as size, brightness or colors of the image. Thus, the image is controlled so that the impression of the image will be matched with that of the audio tone.

Tone visualizing apparatus

An electronic musical instrument having a keyboard, includes a plurality of keys, a plurality of musical tone signal generation systems, a touch detector for producing touch data representing a key touch accompanied by a key depression, a panel operation unit for setting a touch sensitivity representing a sensitivity with respect to a key touch for each of the musical tone signal generation systems, and a register unit for modifying the touch data in accordance with the touch sensitivity corresponding to each of the musical tone signal generation systems. Different tone groups are assigned to the musical tone signal generation systems, and a musical tone signal which has a tone color belonging to the corresponding musical tone group and a pitch corresponding to a key depression is produced from each of the musical tone signal generation systems. Each musical tone group includes at least two tone colors having a common attribute. The musical tone signals from the corresponding musical tone signal generation systems are controlled in accordance with the modified touch data corresponding to the musical tone signal generation systems obtained from the register unit.

Electronic musical keyboard instruments with variable touch sensitivity

A musical tone visualizing apparatus includes at least an image memory for storing plural images relating to players and/or musical instruments of an orchestra, a display unit for displaying the images on a display screen thereof and a display control circuit for controlling the display unit so that displayed images can be varied in response to an inputted musical tone signal or inputted performance information outputted from an electronic musical instrument, for example. Hence, it is possible to move the players and musical instruments in response to performance of the electronic musical instrument, and it is also possible to selectively enlarge one display image of the player and musical instrument whose tone volume is the largest. Thus, the displayed images can be automatically varied in response to the performance of the electronic musical instrument.

Musical tone visualizing apparatus which displays an image of an

An electronic musical instrument has plural keys each capable of designating different tone pitch and touch response. When any key is depressed by player, touch response information is generated in response to touch intensity or depressing pressure of the depressed key. Based on the touch response information, initial-touch response effect or after-touch response effect is applied to a musical tone of depressed key or musical tones of simultaneously depressed keys. The touch response information is corrected such that the generated musical tones will not be heard un-natural. In addition, by controlling the depressing pressure of key, an automatic performance pattern consisting of predetermined accompaniment pattern and rhythm pattern can be designated and changed.

Electronic musical instrument

In storing digital tone waveshape data in a waveshape memory, sampled tone waveshape data is stored in the memory by previously elevating the level of frequency components in a predetermined high frequency region. This predetermined high frequency region corresponds to a frequency region to which quantization noise components belong. The tone waveshape data stored in the waveshape memory in this manner has the signal level of the component of the region including the quantization noise components reinforced as compared with the original tone waveshape. The tone waveshape data read out from the waveshape memory is applied to a filter of a characteristic which restrains the level of the component in the predetermined high frequency region. The level of the quantization noise components belonging to the predetermined high frequency region contained in the tone waveshape data thereby is restrained. On the other hand, the level of the signal components of the predetermined high frequency region is restored to the original level by this restraining of the level. Thus, the quantization noise can be eliminated without impairing the level of the signal component.

Tone signal generation device for an electric musical instrument

In an electronic musical instrument there are provided a channel processor which assigns tone production of a depressed key to one of musical tone producing channels which are smaller in number than total keys. The keys and channels are divided into groups respectively so that keys of one group are assigned to channels of a specific group. The relationship that which key group corresponds to which channel group is changed by an assignment mode changing circuit. Also a switch is provided for selecting a performance mode which switches the operation of the assignment mode changing circuit. Consequently, in one a performance mode all tone production channels are used solely by an upper or lower keyboard or key range while under another performance mode only some of the tone production channels are utilized for a particular keyboard or key range and the remaining tone production channels are utilized by the other keyboard or key range. Colors of musical tones produced by the tone production channels are switched according to the mode of tone production assignment.

Electronic musical instrument with plural tone production channels

A chord generating apparatus of an electronic musical instrument is provided with a selector which selects a single key among a plurality of depressed keys, a detector for detecting a chord type according to types of keys other than the selected key, and a musical tone signal forming circuit for forming a musical tone regarding a chord determined in accordance with outputs of the selector and detector.

Chord generating apparatus of electronic musical instrument

An electronic musical instrument comprises a power source switch, a keyboard including a plurality of key switches corresponding to a plurality of keys, a signal generator for generating a musical tone signal corresponding to a note of a depressed key, and a loudspeaker driven by an output of the signal generator for producing a musical tone. In the instrument, the power source switch is interlocked with the key depression operation so as to supply power to the electronic musical instrument only when a key is depressed.

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Hamamatsu, Japan

Takeshi Adachi