Abstract: A performance recording apparatus includes: a performance information acquiring unit which is configured to acquire performance information indicating a performance performed by a performer; a musical score information acquiring unit which is configured to acquire musical score information indicating a musical score that is used in the performance; and a producing unit which is configured to produce a performance file containing the performance information and the musical score information.

Abstract: A performance recording apparatus includes: a performance information acquiring unit which is configured to acquire performance information indicating a performance performed by a performer; a musical score information acquiring unit which is configured to acquire musical score information indicating a musical score that is used in the performance; and a producing unit which is configured to produce a performance file containing the performance information and the musical score information.

Abstract: A musical-performance analysis device includes: an acquisition section that acquires performance information of a player; a determination section that determines, by comparing the performance information acquired by the acquisition section with reference information indicating a reference of a performance, among performance segments different from one another, a performance segment in which a difference degree between the performance information acquired by the acquisition section and the reference information is large and a performance segment in which the difference degree between the performance information acquired by the acquisition section and the reference information is small; and the specification section that specifies a tendency of the performance on the basis of the difference degree of the performance segment in which the difference degree has been determined to be small by the determination section.

Abstract: A degree of difficulty of a musical piece is comprehensively evaluated also in consideration of a viewpoint of expressions and dynamics of the musical piece. A segment evaluator evaluates a degree of segment difficulty. The degree of segment difficulty indicates the degree of difficulty in performance of a segment (for example, a predetermined number of measures) serving as a part of the musical piece. The segment evaluator divides the musical piece into a plurality of segments, and evaluates the degree of segment difficulty for each of the plurality of segments. The degree of segment difficulty is evaluated in accordance with a predetermined algorithm. A musical piece evaluator evaluates a degree of musical piece difficulty. The degree of musical piece difficulty indicates a degree of difficulty in the performance of the entire musical piece.

Abstract: A nozzle box 10 includes: a lead-in pipe 20; a bent pipe 30 connected to the lead-in pipe 20 and formed so as to change a direction of a channel center line 50 to an axial direction of a turbine rotor 212; and an annular pipe 40 connected to the bent pipe 30 and leading steam to a first-stage nozzle 213a while spreading the steam in a circumferential direction of the turbine rotor 212. In the steam channel lead-in part structure 10, from an inlet of the lead-in pipe 20 toward an outlet of the annular pipe 40, steam channel widths Sa-1 to Sn-1 in a first direction intersecting with the channel center line 50 gradually increases and steam channel widths Sa-2 to Sn-2 in a second direction intersecting with the channel center line 50 and perpendicular to the first direction gradually decreases.

Abstract: A nozzle box 10 includes: a lead-in pipe 20; a bent pipe 30 connected to the lead-in pipe 20 and formed so as to change a direction of a channel center line 50 to an axial direction of a turbine rotor 212; and an annular pipe 40 connected to the bent pipe 30 and leading steam to a first-stage nozzle 213a while spreading the steam in a circumferential direction of the turbine rotor 212. In the steam channel lead-in part structure 10, from an inlet of the lead-in pipe 20 toward an outlet of the annular pipe 40, steam channel widths Sa-1 to Sn-1 in a first direction intersecting with the channel center line 50 gradually increases and steam channel widths Sa-2 to Sn-2 in a second direction intersecting with the channel center line 50 and perpendicular to the first direction gradually decreases.

Abstract: In order to precisely express motion of a key or motion of a hammer, a voice message for the polyphonic key pressure and another voice message for the control change, which stand idle in an automatic player piano, are used to express rough key position or rough hammer position and an offset from the rough key position or rough hammer position, and the offset is described at a high resolution on an ordinary trajectory between the rest position and the end position and at a low resolution outside of the ordinary trajectory; moreover, the numerical range expressed by the third byte of the voice message for the polyphonic key pressure is divided into two numerical sub-ranges respectively assigned to the keys and hammers so that only a few voice messages are required.

Abstract: An automatic player piano has a recorder for recording a performance into a music data file: when a set of music data codes expressing the performance is prepared, a file name is automatically assigned to the music data file through a subroutine program; while the subroutine program is running, the maximum integer, which forms a part of a file name already stored in a memory unit, is determined, and the integer next to the maximum integer is introduced into the file name in so far as the maximum integer is less than the limit of a numerical range, whereby the automatic player piano makes the order of creating the music data files clearly readable from the tile names: when the maximum integer is equal to the limit, a skipped integer is introduced into the file name, whereby the integers in the numerical range are economically reused.

Abstract: In order to precisely express motion of a key or motion of a hammer, a voice message for the polyphonic key pressure and another voice message for the control change, which stand idle in an automatic player piano, are used to express rough key position or rough hammer position and an offset from the rough key position or rough hammer position, and the offset is described at a high resolution on an ordinary trajectory between the rest position and the end position and at a low resolution outside of the ordinary trajectory; moreover, the numerical range expressed by the third byte of the voice message for the polyphonic key pressure is divided into two numerical sub-ranges respectively assigned to the keys and hammers so that only a few voice messages are required.

Abstract: A keyboard musical instrument has keys equal to a multiple of five assigned to the fingers of a trainee, an electric tutor and an electronic sound generating system, and the electric tutor gives the trainee guide in practicing the fingering along a passage, wherein the electronic sound generating system generates the tones when the trainee satisfies predetermined conditions for the training so as to correctly guide him in the practice.

Abstract: A keyboard instrument is configured such that a flat panel-like display unit such as a liquid crystal display for displaying character information and/or images is provided on an instrument main body and that speakers, a recording/reproducing unit for multi media such as sound and/or image recording media, a microphone and a "karaoke" reproduction unit are connected to the display unit so as to improve the function of displaying a notation and/or lyric at the time of a performance, a performance function such as an ensemble performance or "karaoke" performance, and a tuning function.

Abstract: A brand-new player piano is designed to have a compatibility with the conventional player piano and the electronic musical instrument based on the MIDI standard while providing a capability of playing a highly skilled music performance such as the performance technique of half stroke. The player piano creates a new version of performance information which uses a key-depression event frame in addition to a string-striking event frame and a key-release event frame. Herein, the string-striking event frame contains extensional information for a string-striking velocity, while the key-release event frame contains extensional information for a key-release velocity. The extensional information is not specifically defined by the MIDI standard and is neglected by the conventional player piano.

Abstract: A solenoid driving circuit contains solenoids, each of which is driven to produce a magnetic field for driving each of keys of a player piano. A NPN transistor is provided to allow or block a flow of current across each solenoid. The solenoid is connected between a DC power source for providing a source voltage and a collector of the NPN transistor whose emitter is grounded. A drive signal, which is subjected to pulse-width modulation, is supplied to a base of the NPN transistor, so that the NPN transistor is switched over between ON and OFF. A diode is introduced to provide prescribed forward voltage for attenuation of the current across the solenoid when the NPN transistor is turned OFF. Herein, an anode of the diode is connected to a connection between the solenoid and NPN transistor, while a cathode of the diode is connected to a cathode of a zener diode having prescribed reverse voltage. An anode of the zener diode is connected to the DC power source.

Abstract: An automatic player piano records an original key motion reciprocated between a rest position and an end position as a series of a key-on event, a hammer event and a key-off event by using key/hammer sensors, and supplements the key/hammer event for an unusual key motion such as a half stroke, thereby faithfully reproducing the original key motions in a playback mode.

Abstract: An automatic player piano controls keys to be rotated by solenoid-operated actuator units in such a manner as to pass a reference point on a trajectory of the key at a reference velocity in a playback mode, and a hammer driven by the depressed key strikes strings at the same intensity as that in a recording mode, because the intensity is variable with the reference velocity at the reference point.

Abstract: A hammer sensor incorporated in a keyboard musical instrument monitors a motion of each hammer assembly, and a controller not only determines a hammer velocity and an impact time for generating a set of music data codes representative of a music performance but also measures an actual distance between the hammer sensor and an impact point against a music string on the basis of a forward trajectory and a backward trajectory measured by the hammer sensor; thereby allowing a worker to easily adjust the hammer sensor to an appropriate position.