Abstract: An action for a keyboard-based musical instrument is provided for preventing action parts made of a synthetic resin from being charged to eliminate stains due to dust and motes in the air attracted by static electricity. The action is composed of a plurality of action parts coupled to one another, including a hammer. The action actuates in response to depression on a key to swing the hammer which strikes a string. At least one of the plurality of action parts is made of a synthetic resin which has electrical conductivity at least on a surface thereof.

Abstract: There is provided a keyboard device for a keyboard musical instrument, which is capable of enhancing the key touch feeling sensed when each key is depressed, and durability of stoppers. Keys each open downward, and have side walls and an abutment portion provided inside the side walls. The abutment portion has a lower end located at approximately the same height as lower ends of the side walls. The keys each perform downward pivotal motion when depressed. Stoppers are arranged under the keys in a manner associated therewith, respectively, for abutment of the side walls and the abutment portion of the associated key thereagainst, for stopping downward pivotal motion thereof. The stoppers have a shock-absorbing property.

Abstract: A key for a musical instrument is provided for effectively giving a touch load to the key, while employing an alternative material having a specific gravity equal to or larger than a predetermined value, instead of lead, as a material for the weight, simplifying works involved in fixing the weight in a key body, and reducing the frequency of troubles such as cracking of the key body, thereby reducing the manufacturing cost. The key comprises a swingable key body formed with an embedding hole which extends through a front plate in the vertical direction to reach the key body, and a weight made of an alternative material other than lead. The weight has a smooth portion and a knurled portion on the outer peripheral surface thereof. The weight is press-fitted into the embedding hole from the smooth portion and thereby fixed in the key body.

Abstract: A keyboard lid opening and closing mechanism for a keyboard musical instrument having a simple structure and not requiring a large space for installation thereof. To house a keyboard lid in the folded state inside the keyboard musical instrument, the mechanism is provided with a reverse V-shape forming portion disposed at the place where the undersurface of the keyboard lid passes while moving, a rotation support portion including first connecting groove walls, and a keyboard lid stop portion including second connecting groove walls. Therefore, the structure of the mechanism for opening and closing the keyboard lid is simplified, and a large space for installation of the mechanism is not necessary since these portions include no movable parts.

Abstract: There are provided a power line spectrum extractor for extracting power line spectra of a waveform to be processed; a level interpolation controller for performing level interpolation control on the power line spectra at every unit of a certain frequency, which is not higher than half a sampling frequency; and a cepstrum analyzer for performing Fast Fourier Transformation on the power spectra subjected to the level interpolation control and performing Inverse Fast Fourier Transformation on values found by performing level setting with a specified coefficient.

Abstract: A keyboard device for an electronic keyboard musical instrument is provided for reducing the manufacturing cost by reducing the number of parts and the number of assembling steps associated with the attachment of a substrate, and securely attaching the substrate to a chassis through a spacer. The keyboard device comprises a plurality of keys; a chassis for supporting a plurality of keys; a substrate attached to the chassis for detecting information on depression on the keys; and a spacer interposed between the substrate and chassis. The spacer has tabs for preventing rotation, while the substrate is formed with engaging holes. The spacer is attached to the substrate with the tabs in engagement with the engaging holes. The substrate is attached to the chassis with a first screw driven into the spacer through the chassis.

Abstract: An acoustic control system for an electronic musical instrument, which can obtain optimal acoustic characteristics irrespective of whether or not a low range speaker is attached to a body thereof. A piano body has high range and mid range speakers. A low range speaker is removable from the body. A stand-excluding switch designates a first speaker-use mode for using the high range and mid range speakers alone, and a stand-including switch designates a both speaker-use mode for using both the high range and mid range speakers and the low range speaker. A ROM stores stand-excluding and stand-including factors for setting acoustic characteristics in the two modes, respectively. A CPU reads one of the factors, which corresponds to the mode designated by the stand-excluding or stand-including switch. A tone generator circuit generates a musical tone signal to be reproduced in one of the modes, based on the read factor.

Abstract: 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.

Abstract: A keyboard device for an electronic keyboard musical instrument is provided for permitting a significant reduction in the number of parts constituting a hammer supporting members and the number of assembling steps required therefor, thereby reducing a manufacturing cost, and also for permitting hammers to be mounted in a high mounting accuracy to eliminate noise. The keyboard device comprises a chassis, a hammer rail made of an aluminum extrudate and coupled to the chassis, a plurality of keys pivotably supported by the chassis, a plurality of hammers each provided for each of the plurality of keys, pivotably supported by the hammer rail and configured to pivot in response to depression on a key associated therewith, and a stopper mounted to the hammer rail for restricting a pivotal movement of a hammer caused by depression on a key associated with the hammer.

Abstract: A woody decorative item features in that a sliced veneer sheet can be free from a change in shape and dimensions even with an aqueous adhesive and hence handled with ease, and an improved anchoring effect permits the sliced veneer sheet to be securely bonded to a base. The woody decorative item comprises a sliced veneer, an unwoven fabric adhered on the back of the sliced veneer, a woven fabric adhered on the unwoven fabric, and a base made of a synthetic resin and bonded on the back of the sliced veneer through the woven fabric. A method of manufacturing the woody decorative item comprises the steps of providing the sliced veneer, sequentially adhering the unwoven fabric and woven fabric on the back of the sliced veneer with pressure to fabricate the sliced veneer sheet, setting the sliced veneer sheet in a mold, supplying a synthetic resin on the back of the sliced veneer sheet in the mold to form a base thereon, and pressing the base against the sliced veneer sheet for integration.

Abstract: A music score image is read, a two-valuing threshold is set based on a staff interval and a line width of the staff so as to input the music score image as a two-valued image, then music signs are recognized to prepare data for playing and/or music score displaying. With this arrangement, the image two-valuing threshold which seriously affects the recognition rate can be automatically set to an optimum value for the recognition.

Abstract: A key for a musical instrument is provided for effectively giving a touch load to the key, while employing an alternative material having a specific gravity equal to or larger than a predetermined value, instead of lead, as a material for the weight, simplifying works involved in fixing the weight in a key body, and reducing the frequency of troubles such as cracking of the key body, thereby reducing the manufacturing cost. The key comprises a swingable key body formed with an embedding hole which extends through a front plate in the vertical direction to reach the key body, and a weight made of an alternative material other than lead. The weight has a smooth portion and a knurled portion on the outer peripheral surface thereof. The weight is press-fitted into the embedding hole from the smooth portion and thereby fixed in the key body.

Abstract: Multipliers respectively multiply a tone signal supplied from a sound source and a tone signal corrected by a filter according to hearing correction characteristics by balance control coefficients generated by a control coefficient generator based on tone volume control data, and an adder adds the products to adjust the tone volume balance. A multiplier multiplies the tone signal output from that adder by a tone volume control coefficient generated by the control coefficient generator based on the tone volume control data to adjust the tone volume. Frequency characteristics for correcting hearing characteristics are given to the tone signal in accordance with the tone volume of tones to be generated, thus maintaining tone volume balance upon hearing among tone colors of tones to be generated by an electronic musical instrument.

Abstract: 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.

Abstract: A front lid opening and closing assist which enables an easy and safe operation of opening and closing a front lid of a keyboard instrument. A buffer in the front lid opening and closing assist has a first damping mechanism for damping the front lid when pivoted from a neutral position to an open position, and a second damping mechanism for damping the front lid when pivoted from the neutral position to a closed position. When the front lid is pivoted beyond the neutral position, it spontaneously pivots toward the open or closed position by its own weight. However, this motion is damped by the first and second damping mechanisms, which results in a slowed pivot motion of the front lid. As a result, a user can safely open or close the front lid relative to a back lid, with only minimal force for supporting the front lid.

Abstract: A variety of instructions are inputted through different input modes on a single touch panel. Calculator 22 calculates the coordinates of the contact point on the touch panel 91. Area table 24 has a flag assigned to each area in each image for indicating that the segment is a continuous press input area. Area identifier 25 examines the area table 24 whether the contact point on the panel is in the continuous or the instant touch input area. Examined area attribute is saved in an input mode storage 26. When receiving the mode data from the storage 26 and the coordinates, a screen controller 20 switches the image to another or updates the settings and graphic item in the image. In response to the mode data of the storage 26 and the coordinate data, a parameter setting 27 modifies the parameters of the envelope or effect.

Abstract: A key for a musical instrument is provided for facilitating the attachment of a weight, and adjustments of a touch load, while using an alternative material for substitution for lead as a material for the weight. The key comprises a swingable key body formed with embedding holes, and weights each made of a material other than lead and having a threaded outer peripheral surface. The weight is screwed into the embedding hole for removable fit into the key body to give a load to the key body. A plurality of types of weights different in load from one another are provided for selecting one having an appropriate load therefrom to adjust the touch load.

Abstract: A key is provided for permitting simple attachment of a weight and easy adjustment of a touch load, while using an alternative material for substitution for lead as a material for the weight, to thereby reduce the manufacturing cost. A swingable key body is formed with an embedding hole. The weight is made of a composite material produced by blending a plurality of kinds of materials except for lead in a predetermined blending proportion to have a predetermined specific gravity, and is removably attached to the embedding hole of the key body.

Abstract: The present invention provides an exterior structure for an electronic keyboard instrument which has excellence in an outward appearance and which can be produced easily without detracting acoustic characteristics. In the present invention, a recess groove 9 extending in a direction in which keyboards 3 are arranged is formed at an upper portion of a back panel 4 of the electronic keyboard instrument 1, a locking edge 8a formed at an upper edge of a speaker cover 8 is fitted into the recess groove 9, and a lower edge of the speaker cover 8 is fixed to a lower portion of the back panel 4 by a screw 11. A lower portion of the back panel 4 is provided with a positioning stopper 4d which abuts against a back surface of a keybed 12 of the electronic keyboard instrument 1, and a fixing piece 4e which abuts against a lower surface of the keybed 12. A thick plate 14 having rigidness is provided around the periphery of the speaker-mounting hole 6.

Abstract: In an erroneous opening prevention mechanism according to the present invention, a hook and a hook support are loosely engaged with one another when a front lid, folded back on a back lid, is unfolded, or laid flat. If an attempt to raise the whole lid laid flat on a grand piano main body is made, it is impossible to raise the lid due to the locking of the hook and the hook support. When the front lid is folded back onto the back lid, on the contrary, the hook and the hook support are released from one another and, therefore, the whole lid can be raised. Accordingly, the erroneous opening prevention mechanism prevents the whole lid from being raised without first folding back the front lid.