Abstract: A keyboard device for a keyboard instrument includes a plurality of key support mechanisms each provided in a state engaged with a keyboard chassis and supporting an associated key from below, for causing, upon key depression, the depressed key to operate such that the key pivotally moves about a virtual pivot located rearward of a rear end of the key. Each key support mechanism includes first and second arms each extending a predetermined length in a front-rear direction and configured to be swingable. The first and second arms are pivotally and slidably connected to each other. A rear-side connecting portion of the key includes a connecting body portion and a pair of engagement protrusions, and a rear-side connecting portion of the second arm includes two connecting arm portions having a bifurcated shape and formed with connecting holes.

Abstract: A keyboard device for a keyboard instrument includes a keyboard chassis, a plurality of keys arranged side by side in an upper portion of the keyboard chassis, and a plurality of hammers provided in association with the plurality of keys, respectively. Each hammer is pivotally supported, below an associated key, via a hammer support shaft on the keyboard chassis, and is pivotally moves in a manner interlocked with depression of the associated key. For a predetermined first hammer, which is associated with a predetermined first key of the plurality of keys, and a predetermined second hammer, which is associated with a predetermined second key of the plurality of keys, respective angles of pivotal movement, caused by key depression, of the first hammer and the second hammer are set to be different from each other.

Abstract: A keyboard device for a keyboard instrument, including a key support mechanism assembled to a keyboard chassis, improved not only in the ease of assembly during manufacturing of the keyboard device but also in the ease of disassembly during maintenance of the same. The keyboard device includes a keyboard chassis, a key disposed on the keyboard chassis, and a key support mechanism which supports the key from below and causes, upon depression of the key, the depressed key to operate such that the key pivotally moves about a virtual pivot. The key support mechanism includes a first arm and a second arm which, when mounted on the keyboard chassis during assembly of the keyboard device, in a state where one of the arms is pivotally engaged with the keyboard chassis, the other can be mounted on the keyboard chassis while being connected to the one.

Abstract: A key for a keyboard device includes a resin key body and one or a plurality of woody boards attached along at least part of a pair of side portions of the key body. The key body includes an upper portion protrusion which extends along an upper end of each of the side portions and is formed continuous with the top portion, the upper portion protrusion protruding in a lateral direction of the key body. Each woody board is disposed such that an upper end surface thereof is in contact with a lower surface of the upper portion protrusion. The upper portion protrusion has a thickness dimension in a vertical direction smaller than a thickness dimension of the top portion of the key body.

Abstract: A keyboard device for a keyboard instrument includes a keyboard chassis, a key disposed on the keyboard chassis, and a key support mechanism which supports the key from below and causes the key to operate such that the key pivotally moves about a virtual pivot. One of a first arm rear-side connecting portion and a second arm front-side connecting portion includes an engagement shaft extending in a left-right direction, and the other of them includes an engagement recess which has a U shape in side view and open in one of a front direction and a rear direction and is engaged with the engagement shaft. A cushioning member in sliding contact with an inner surface of the engagement recess is mounted on the engagement shaft in a state covering an outer peripheral surface of the engagement shaft.

Abstract: An automatic performing apparatus being an automatic performing apparatus that automatically performs performance data segmented into a plurality of performance sections, the apparatus includes: a first automatic performing unit configured to perform automatic performance of the performance data in a first performance section at a first tempo in response to an input of a first external event; and a second automatic per unit configured to, when a second external event is input before the automatic performance in the first performance section is finished, continue the automatic performance in the first performance section at a second tempo different from the first tempo, the second automatic performing unit configured to, when the automatic performance in the first performance section is finished, perform automatic performance of the performance data in a second performance section at a third tempo.

Abstract: A digital signal processing device includes: a delay means that delays audio data in units of sampling periods; and a control means that writes audio data to a first buffer memory one word at a time in sequence at a sampling period, performs control to burst transfer burst length audio data to a DRAM from the first buffer memory, performs control to burst transfer the burst length audio data to a second buffer memory from the DRAM, and outputs audio data to the delay means from the second buffer memory one word at a time in sequence at the sampling period, in which a delay time of audio data output by the delay means is determined by a combination of a delay time of multiple sampling period units depending on a burst length of the DRAM and a delay time of a sampling period unit of the delay means.

Abstract: A keyboard device for a keyboard instrument, capable of obtaining excellent touch feeling and stable key stroke without giving sponge feeling or unpleasant vibration during key depression. The keyboard device includes a keyboard chassis, keys pivotally supported on the chassis, hammers swingably supported on the chassis and swinging along with key depression, a hammer upper limit stopper provided on a chassis rear end and contacted by a hammer rear end from below during key depression, and a key lower limit stopper provided on a chassis front end and contacted by front ends of the keys from above during key depression. The hammer upper limit stopper has predetermined flexibility that allows deformation of the hammer upper limit stopper such that after contact of a hammer during key depression, an associated key reaches its lowest position in a state in contact with the key lower limit stopper.

Abstract: A digital signal processing device includes a control unit that performs control to alternately burst transfer burst length audio data in a first half area of a first buffer memory and burst length audio data in a second half area of the first buffer memory to a DRAM, in which the control unit performs control to burst transfer the burst length audio data in the first half area of the first buffer memory to the DRAM while writing audio data one word at a time to the second half area of the first buffer memory in sequence and performs control to burst transfer the burst length audio data in the second half area of the first buffer memory to the DRAM while writing audio data one word at a time to the first half area of the first buffer memory in sequence.

Abstract: A keyboard device for a keyboard instrument, capable of largely reducing noise generated when a hammer contacts a lower limit stopper during key release immediately after key depression. The keyboard device includes a keyboard chassis disposed on a keybed, keys pivotally supported on the chassis, hammers pivotally supported on the chassis below the keys and each vertically pivotally moved, an intermediate rail mounted on the chassis below a rotational shaft of the hammers and its vicinity in a state floating from the keybed, and a lower limit stopper mounted on the intermediate rail, such that each hammer is placed thereon via its placement-contact portion when in a key-released state and contacts the same from above via the placement-contact portion when pivotally moving downward in accordance with key release after being moved upward by key depression, whereby further pivotal motion of the hammer is stopped.

Abstract: A musical tone generating device includes: a nonvolatile storage device that stores musical tone waveform data; a volatile storage device; and a control means that, when a power supply is turned on, performs control to transfer musical tone waveform data to the volatile storage device from the nonvolatile storage device, in the case where an instruction to reproduce a musical tone is given, the control means to read musical tone waveform data from the volatile storage device, and in the case where an error in the read musical tone waveform data is detected, the control means to perform control to overwrite musical tone waveform data obtained by correcting the musical tone waveform data including the detected error to the volatile storage device or transfer normal musical tone waveform data corresponding to the musical tone waveform data including the detected error to the volatile storage device from the nonvolatile storage device.

Abstract: A digital signal processing device includes: a delay means that delays audio data in units of sampling periods; and a control means that writes audio data to a first buffer memory one word at a time in sequence at a sampling period, performs control to burst transfer burst length audio data to a DRAM from the first buffer memory, performs control to burst transfer the burst length audio data to a second buffer memory from the DRAM, and outputs audio data to the delay means from the second buffer memory one word at a time in sequence at the sampling period, in which a delay time of audio data output by the delay means is determined by a combination of a delay time of multiple sampling period units depending on a burst length of the DRAM and a delay time of a sampling period unit of the delay means.

Abstract: A digital signal processing device includes a control unit that performs control to alternately burst transfer burst length audio data in a first half area of a first buffer memory and burst length audio data in a second half area of the first buffer memory to a DRAM, in which the control unit performs control to burst transfer the burst length audio data in the first half area of the first buffer memory to the DRAM while writing audio data one word at a time to the second half area of the first buffer memory in sequence and performs control to burst transfer the burst length audio data in the second half area of the first buffer memory to the DRAM while writing audio data one word at a time to the first half area of the first buffer memory in sequence.

Abstract: A decorative molded article has a light source disposed on a back side, for causing different designs to appear on a front surface side thereof, when the light source is off and when on, respectively. A base made of a predetermined synthetic resin permeable to light from the light source is disposed close to the light source. A wood veneer having a grain and permeable to light from the light source is disposed on a front side of the base. A colored coating layer is formed on a front side of the base using a paint having a predetermined color and a clear coating layer is formed on a front side of the colored coating layer using a transparent clear paint. The colored coating layer makes the grain difficult to visually recognize when the light source is off and visually recognizable when on.

Abstract: An upright keyboard instrument reduced in depth dimension and compact as a whole. Damper levers each extend in a vertical direction and are pivotally movably supported at or in the vicinity of a longitudinal center thereof, in a side-by-side arrangement in a left-right direction at a location rearward of actions. A damper rod extends in a left-right direction. A pedal rod extends in the vertical direction and is disposed forward of the damper levers, so as to be moved upward by depression of a pedal. A damper lever drive mechanism is provided between a longitudinal end of the damper rod and an upper end of the pedal rod and drives lower portions of the damper levers such that the lower portions are pressed rearward by moving the damper rod rearward in accordance with upward movement of the pedal rod.

Abstract: A touch weight adjustment mechanism for a keyboard device, which is capable of adjusting a touch weight of a key easily and appropriately by using a coil spring and changing the urging force of the spring. An adjustment spring is formed by a coil spring for causing a tensile force thereof to act on the key, thereby increasing the touch weight of the key. An adjustment shaft is formed in a rod shape and is movable in a lengthwise direction by being operated for rotation. A rotary connection member connects between one end of the adjustment spring and one end of the adjustment shaft, which are closest to each other, and a spring-side connecting portion thereof connected to the adjustment spring and a shaft-side connecting portion thereof connected to the adjustment shaft are rotatable relative to each other.

Abstract: A keyboard device having keys enabling sufficient weight of touch to be obtained in spite of being configured to be shorter in length than those of the grand piano and. Link mechanisms are each provided on a base for supporting an associated one of the keys from below and configured to cause the associated key to operate such that when a front end of the key is depressed, an amount of downward movement of a rear end of the key becomes approximately half of an amount of downward movement of the front end of the key. Each link mechanism includes front-side and rear-side key link bars and front-side and rear-side connecting link bars. The front-side and rear-side connecting link bars are pivotally supported, respectively, and are pivotally and slidably connected to each other via respective rear and front ends thereof.

Abstract: A keyboard device for an electronic keyboard instrument, capable of suppressing bouncing of a hammer returning to its original position. A key extends in a front-rear direction swingably about a balance rail pin. The hammer is formed vertically pivotally movable between initial and pivotally-moved positions about a hammer fulcrum provided near a rear end of the key and is placed on the key via a key contact portion in contact with a rear end of upper surface of the key from above, for pivotal motion by swinging of the key. A hammer cushion is provided on upper surface of the key at a predetermined location forward of the key contact portion to suppress bouncing of the hammer by contact with a cushion contact portion of the hammer returning from the pivotally-moved position to the initial position by releasing the key depression.

Abstract: A handwritten music sign recognition device (10) has: a touch information obtaining part (21) which obtains, as position information, a position of an input means on a screen every time the input means moves, from when the input means touches the screen until when the input means is moved away therefrom; a vector information creation part (22) which creates attributes of a vector indicating a trace of movement of the input means as vector information based on the position information; and a stroke characteristic amount derivation part (23) which derives a characteristic amount of a stroke based on the vector information included in the stroke information.

Abstract: A topboard reflection preventer for a grand piano, which is capable of positively preventing lighting from being reflected by an open topboard, while maintaining excellent appearance of a piano body. The topboard reflection preventer for a grand piano is attached to an openable and closable topboard formed by a topboard rear and a topboard front, and prevents lighting from above from being reflected by the topboard in a state of the topboard held open in an inclined position. The topboard reflection preventer includes a reflection preventer body attached to the topboard rear and the topboard front folded onto the topboard rear, in a state covering whole upper surfaces of the topboard rear and the topboard front, and a holding member for holding the reflection preventer body so as to prevent the reflection preventer body from falling off the topboard held open in the inclined position.