CN107909988A - A kind of automatic page turning method of electronic organ spectrum and electronic organ spectrum - Google Patents
A kind of automatic page turning method of electronic organ spectrum and electronic organ spectrum Download PDFInfo
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- CN107909988A CN107909988A CN201711179989.7A CN201711179989A CN107909988A CN 107909988 A CN107909988 A CN 107909988A CN 201711179989 A CN201711179989 A CN 201711179989A CN 107909988 A CN107909988 A CN 107909988A
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10G—REPRESENTATION OF MUSIC; RECORDING MUSIC IN NOTATION FORM; ACCESSORIES FOR MUSIC OR MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR, e.g. SUPPORTS
- G10G7/00—Other auxiliary devices or accessories, e.g. conductors' batons or separate holders for resin or strings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D9/00—Bookmarkers; Spot indicators; Devices for holding books open; Leaf turners
- B42D9/04—Leaf turners
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
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Abstract
The invention belongs to musical instruments technical field,Relate generally to a kind of automatic page turning method of electronic organ spectrum and electronic organ spectrum,Including music stand,The music stand is U-shaped structure,The music stand is metal framework,Mounting hole is offered in the middle part of the music stand right end outer wall,Rubber ring is installed in the mounting hole,Adjustment axis is equipped with the rubber ring,Connecting pole is equipped with the middle part of the music stand left end inner wall,Display device is installed on the music stand,The display device includes outer frame body and display,The outer frame body left and right ends offer connecting hole,The outer frame body left end connecting hole is set on connecting pole,The music stand bottom offers accommodating groove,Stent is installed in the accommodating groove,The pedestal lower end offers mounting groove,The stent bottom is provided with base plate,It can store a large amount of music scores of Chinese operas,The angle and height of qin spectrum can be arbitrarily adjusted according to the different demand of player,It is easy to carry,At the same time can also be according to performance progress automatic page turning.
Description
Technical field
The invention belongs to musical instruments technical field, and in particular to a kind of automatic page turning side of electronic organ spectrum and electronic organ spectrum
Method.
Background technology
Qin spectrum is watched in piano for convenience, the qin spectrum plate for putting qin spectrum is usually provided with the cover board of piano,
Qin spectrum plate is inclined on the cover board of fender, but conventional music stand is mostly stationary structure, it is difficult to viewing angle is adjusted,
And occupied space is very big, it has not been convenient to carried, and run into some special circumstances as place plane be inclined-plane when, music stand
Often it is difficult to fixed, it is necessary to which music stand is fixed using other equipment, viewing that is inconvenient for use and influencing qin spectrum；
The position of the more own placement music score that music score is placed on to piano of piano practice person at the same time, there are inconvenience during practice
Part, when when music score is very thin, such as only several paper, its music score is not easy to put at the position of music score in piano vertically, second, happy
When spectrum is very thick, for example it is a thicker book, easy slide downward, it some times happens that the situation that book closes automatically, influences to train；And
And the qin of paper material is composed, manual page turning is needed in playing procedure, the number of pages of papery qin spectrum is limited, and capacity is smaller, and player is past
Composed toward to prepare many papery qins, it is inconvenient to carry.
Many insufficient electronic organs spectrums start to popularize due to more than, and traditional electronic organ spectrum need to compose qin when in use into
Row page turning is played in the form of lantern slide.Player is needed to stop performance progress page turning by the way of manual page turning easy
The rhythm of player is influenced, although and stopping playing without player by the form of lantern slide, the broadcasting speed of lantern slide
It is particularly particularly evident when learning new song smoothness and playing and the performance speed of player is difficult to match.
The content of the invention
The problem of based on being mentioned in above-mentioned background technology, the present invention provides a kind of electronic organ spectrum, it can store a large amount of songs
Spectrum, can arbitrarily be adjusted according to the different demand of player qin spectrum angle and height, it is easy to carry, at the same can also according to play into
Spend automatic page turning.
The technical solution adopted by the present invention is as follows：
A kind of electronic organ spectrum, including music stand, the music stand are U-shaped structure, the music stand is metal framework, described
Mounting hole is offered in the middle part of music stand right end outer wall, rubber ring is installed in the mounting hole, tune is equipped with the rubber ring
Nodal axisn, the music stand left end inner wall middle part are equipped with connecting pole, display device, the display device are provided with the music stand
Including outer frame body and display, the outer frame body left and right ends offer connecting hole, and the outer frame body left end connecting hole is arranged
On connecting pole, the outer frame body right end connecting hole is set in adjustment axis to be fixedly connected with adjustment axis, the music stand bottom
Accommodating groove is offered, the music stand rear and front end offers notch in storage trench bottom, stent is provided with the accommodating groove,
The left and right sides of the stent offers magnetic slot, and magnetic steel ingot is inlaid with the magnetic slot, and the pedestal lower end offers
Mounting groove, the width dimensions of the mounting groove are equal to the width dimensions of notch, and the stent bottom is provided with base plate, described
Base plate is equipped with otic placode, and the otic placode is hinged in mounting groove, the display include display screen, microprocessor, display card,
Memory, sound pick-up, USB interface and battery, the display screen, display card, memory, sound pick-up, USB interface and battery difference
It is electrically connected with microprocessor, the memory is electrically connected with USB interface, and the display screen is electrically connected with display card；The USB connects
Mouth is arranged on below display screen, and the microprocessor, display card, memory are arranged on the back side of display screen.
Using the invention of above-mentioned technical proposal, display device is hingedly mounted on music stand, and music stand right end, which is equipped with, to be adjusted
Axis and regulating wheel, adjustment axis left end are fixedly mounted in outer frame body, drive adjustment axis to rotate controllable show by rotating regulating wheel
To meet the needs of user, music stand bottom offers accommodating groove, is slided in accommodating groove and be equipped with stent the angle of showing device,
Magnetic steel ingot is installed, by pulling the height of bracket adjustment music stand, and the design of magnetic steel ingot make it that qin is composed after adjusting on stent
Frame will not be glided due to self gravitation, and stent bottom is hinged with base plate, and music stand is put by base plate, is prevented
There is music stand and place the problem of unstable；Base plate, stent and display device are reduced after use, avoid space hold same
When be convenient for carrying, microprocessor, show that the setting of card, memory, sound pick-up causes, the sound that sends of performance is received by sound pick-up
Sound controls automatic page turning by the processing of microprocessor, and the progress of page turning is consistent with performance progress, and simultaneous memory can also store
A large amount of music scores of Chinese operas.
Further limit, the adjustment axis left end installs toothed disc, and the toothed disc is integrally formed with adjustment axis, described outer
The teeth groove to match with toothed disc tooth is offered on framework right end connecting hole inner wall, the toothed disc is arranged in teeth groove, so
Structure design, adjustment axis be fastened on by toothed disc in outer frame body outer frame body is carried out it is radially fixed, while in detachable maintaining
When it is more convenient.
Further limit, the adjustment axis right end is equipped with regulating wheel, is integrally formed on the circumference of the regulating wheel equipped with column
Body is raised, such structure design, by the frictional force of the raised increase regulating wheel circumferential surface of cylinder, makes adjusting lighter,
Such structure design, by the frictional force of the raised increase regulating wheel circumferential surface of cylinder, makes adjusting lighter.
Further limit, the regulating wheel right end end face is equipped with calibration loop, 0 °, 90 °, 180 °, 270 ° of the calibration loop
Position is equipped with angle mark, and such structure design, the angle of adjusting substantially can be clearly rotated by angle target knowledge, is conveniently made
With.
Further limit, the display rear end is provided with three-dimensional display screen, the three-dimensional display screen and microprocessor electricity
Connection, such structure design, also Three-dimensional Display can be carried out by using three-dimensional display screen by the content of the music score of Chinese operas.
In addition the invention also discloses a kind of electronic organ spectrum from page turning method：
Step 1, is divided into 1,2,3,4 ... n pages by a music score of Chinese operas, and carries out performance record with every page music score of Chinese operas contents
Pitch and loudness of a sound are stored for a fixed duration of a sound sequence units；
Step 2, the loudness of a sound of sound and pitch that by digital sound pick-up to playing when sends are acquired and by loudness of a sound
Digital signal is respectively converted into pitch signal and is transmitted to rear end equipment microprocessor as real-time duration of a sound sequence, and microprocessor is by suitable
The fixation duration of a sound sequence units of sequence extraction storage are contrasted with the sound that sound pick-up receives, matched；
Step 3, after microprocessor completes the contrast of a fixed duration of a sound sequence units, sends a control signal control
Display screen plays lower one page qin spectrum, then carries out the contrast that step b carries out next fixed duration of a sound sequence units again.
Further limiting, the first segment note of the music score of Chinese operas nth page, has repetition embodiment in the last column of page (n-1)th, and
It is not recorded in the repeating part of nth page in fixed duration of a sound sequence units.
Further limit, when the pitch sequence extracts, pitch extraction is carried out using wave files, by vocal signal
Adding window framing, and by auto-correlation function acf (τ)=calculating, remove excessive or too low peak value, and utilize semitone=
12*log2frequency/440+69 calculates extreme point, extracts pitch period, obtains pitch sequence.
Further limit, during the loudness of a sound sequential extraction procedures, first to the vocal signal adding window framing of each music data section, read
Taking the average amplitude of every frame signal, the voice signal sample rate set is as 6-8kHz sampling numbers as the loudness of a sound value of this frame
256, it is 12-15ms per frame length, it is 0 that frame, which moves, extracts loudness of a sound feature to each note of every page of music score of Chinese operas, obtains loudness of a sound sequence.
Further limit, contrast judge when, to fix loudness of a sound in duration of a sound sequence units and pitch as benchmark, by table
The arithmetic mean of instantaneous value of the strong sequence of the person's of drilling performance parts partial and pitch sequence is regular arrive with the loudness of a sound in fixed duration of a sound sequence units and
In the arithmetic mean of instantaneous value same horizontal line of pitch, cosine similarity formula is utilized
The trend of two groups of data in two-dimensional space vector is calculated, according to the ratio a% of similarity using a values as judgment basis to playing
Content is identified, and sets page turning value A, when a values are not up to upper limit A, without page turn over operation.
Further limiting, setting pause judgment value B, multiple syllables are divided into by a duration of a sound sequence with the beat of the music score of Chinese operas,
And using the syllable in each trifle of music score as a trifle sequence, trifle sequence is then contrasted, also with cosine similarity
Formula obtains similarity ratio b%, by being that interpretation foundation chooses whether pause duration of a sound alignment using b values, when b values are not up to
Suspend during upper limit B.
The present invention composes page turning by sound control qin, is recorded first with the standard pronunciation of qin spectrum content, then pass through extraction
Loudness of a sound and pitch in standard pronunciation carry out storage as standard form is referred to, and are then obtained and drilled by sound pick-up in practice, performance
Play sound and cached, then the pitch in extraction caching sound and loudness of a sound carry out contrast judgement with standard pitch loudness of a sound, pass through phase
Knowledge and magnanimity judge performance content-control page turning, and resolution is preferable, and control page turning is contrasted by flipping pages value A, avoid being in playing and practice
When habit interruption is left, the situation that other people arbitrarily operate qin spectrum page turning occurs, while can be by setting the size of page turning value A to itself
It is detected, when A values bigger page turning needs phase knowledge and magnanimity a% higher, can excite practice interest and enable player itself more preferable
Grasp；
When making standard pitch loudness of a sound template, normally shown using electronic music content of pages as a unit be for one
A duration of a sound sequence, is contrasted by the performance loudness of a sound and pitch and the loudness of a sound and pitch of duration of a sound sequence of acquisition, passes through similarity
Carry out judging to play content, and contrasted in order with duration of a sound sequence content, make the page turning time synchronous with performance progress；
By the setting of trifle sequence, when going out the trifle for being unsatisfied with and needing to repeat in practice, due to phase in the music score of Chinese operas
Adjacent trifle substantially differs greatly, and by phase knowledge and magnanimity b% and pause judgment value B, can determine whether that player is playing current trifle
Whether enter the performance of next trifle afterwards, so as to suspend the identification of duration of a sound sequence, dissatisfied part can be repeated.
Brief description of the drawings
The present invention can be further illustrated by the nonlimiting examples that attached drawing provides；
Fig. 1 is the deployed configuration schematic diagram in a kind of electronic organ spectrum embodiment of the present invention；
Fig. 2 is the enlarged structure schematic diagram at A in Fig. 1；
Fig. 3 is the structure diagram that a kind of electronic organ of the present invention composes regulating wheel part in embodiment；
Fig. 4 is the structure diagram that a kind of electronic organ of the present invention composes music stand in embodiment；
Fig. 5 is the enlarged structure schematic diagram at B in Fig. 4；
Fig. 6 is structure diagram after storage in a kind of electronic organ spectrum embodiment of the present invention；
Main element symbol description is as follows：
Music stand 1, mounting hole 11, connecting pole 12, outer frame body 21, display 22, accommodating groove 3, notch 31, stent 4, installation
Groove 41, base plate 5, otic placode 51, regulating wheel 61, adjustment axis 62, toothed disc 63, angle mark 64, cylinder protrusion 65, rubber ring 7.
Embodiment
In order to make those skilled in the art that the present invention may be better understood, with reference to the accompanying drawings and examples to this hair
Bright technical solution further illustrates.
As shown in figs. 1 to 6, a kind of electronic organ spectrum, including music stand 1, music stand 1 are U-shaped structure, music stand 1 is metal
Frame, 1 right end outer wall of music stand middle part offer mounting hole 11, rubber ring 7 are provided with mounting hole 11, is worn in rubber ring 7
There is adjustment axis 62, be equipped with connecting pole 12 in the middle part of 1 left end inner wall of music stand, display device, display device bag are installed on music stand 1
Outer frame body 21 and display 22 are included, 21 left and right ends of outer frame body offer connecting hole, and 21 left end connecting hole of outer frame body is set in
On connecting pole 12,21 right end connecting hole of outer frame body is set in adjustment axis 62 to be fixedly connected with adjustment axis 62, and 1 bottom of music stand is opened
Equipped with accommodating groove 3,1 rear and front end of music stand opens up jagged 31 in 3 bottom of accommodating groove, and stent 4 is provided with accommodating groove 3, branch
The left and right sides of frame 4 offers magnetic slot, and magnetic steel ingot is inlaid with magnetic slot, and 4 lower end of stent offers mounting groove 41, installation
The width dimensions of groove 41 are equal to the width dimensions of notch 31, and 4 bottom of stent is provided with base plate 5, and base plate 5 is equipped with otic placode
51, otic placode 51 is hinged in mounting groove 41, display 22 include display screen, microprocessor, display card, memory, sound pick-up,
USB interface and battery, display screen, display card, memory, sound pick-up, USB interface and battery are electrically connected with microprocessor respectively,
Memory is electrically connected with USB interface, and display screen is electrically connected with display card；USB interface is arranged on below display screen, microprocessor
Device, display card, memory are arranged on the back side of display screen.
Preferably, 62 left end of adjustment axis installation toothed disc 63, toothed disc 63 are integrally formed with adjustment axis 62, and outer frame body 1 is right
The teeth groove to match with 63 tooth of toothed disc is offered on the connecting hole inner wall of end, toothed disc 63 is arranged in teeth groove, such structure
Design, adjustment axis 62 be fastened on by toothed disc 63 in outer frame body 1 outer frame body 1 is carried out it is radially fixed, while in detachable maintaining
When it is more convenient.In fact, the connection structure between adjustment axis 62 and outer frame body 1 can be considered as the case may be.
Preferably, 62 right end of adjustment axis is equipped with regulating wheel 61, is integrally formed on the circumference of regulating wheel 61 raised equipped with cylinder
65, such structure design, is increased the frictional force of regulating wheel circumferential surface by cylinder protrusion 65, makes adjusting lighter.It is real
On border, the other structures of regulating wheel 61 can be considered as the case may be.
Preferably, 6 right end end face of regulating wheel is equipped with calibration loop, 0 ° of calibration loop, 90 °, 180 °, 270 ° of positions be equipped with angle
Mark 64, such structure design, substantially can clearly rotate the angle of adjusting by the knowledge of angle mark 64, easy to use.It is actual
On, the other structures of regulating wheel 64 can be considered as the case may be.
Preferably, 22 rear end of display is provided with three-dimensional display screen, and three-dimensional display screen is electrically connected with microprocessor, such
Structure design, also Three-dimensional Display can be carried out by using three-dimensional display screen by the content of the music score of Chinese operas.In fact, can be as the case may be
Consider the other structures of display 22.
Using the invention of above-mentioned technical proposal, using rotating base plate 5, make according to demand base plate 5 and music stand 1 it
Between formed with angle, base plate 5 is placed on the music stand of piano, regulating wheel 61 is then rotated and changes display device and music stand 1
Between angle, will be adjusted according to the demand of user itself；In highly desirable adjusting, by stent 4 out of accommodating groove 3
Pull out, you can adjust the height of music stand 1, and then the height of display device is adjusted, electronic organ is opened after the completion of adjusting
Compose power supply and electronic organ spectrum can be used, electronic organ is composed according to performance progress automatic page turning, carried out manually without player.
Qin spectrum automatic page turning method is as follows in the present embodiment：
1) music score of Chinese operas is divided into page 1,2,3,4 ... 10, and with every page music score of Chinese operas contents play and record pitch
Stored with loudness of a sound for a fixed duration of a sound sequence units；
2) loudness of a sound of sound and pitch sent during by digital sound pick-up to playing is acquired and by loudness of a sound and pitch
Signal is respectively converted into digital signal and is transmitted to rear end equipment microprocessor as real-time duration of a sound sequence, and microprocessor extracts in order
The fixation duration of a sound sequence units of storage are contrasted with the sound that sound pick-up receives, matched；
3) after microprocessor completes the contrast of a fixed duration of a sound sequence units, a control signal control display screen is sent
Lower one page qin spectrum is played, then carries out the contrast that step b carries out next fixed duration of a sound sequence units again；
For the music score of Chinese operas from page 2, last column has repetition embodiment to the first segment note of every page on the previous page, and then avoids
Do not know nextpage music score of Chinese operas content in page turning, and the problem of playing out error occur；
When pitch sequence extracts, pitch extraction is carried out using wave files, by vocal signal adding window framing, and is passed through
Auto-correlation function acf (τ)=calculating, removes excessive or too low peak value, and utilizes semitone=12*
Log2frequency/440+69 calculates extreme point, extracts pitch period, obtains pitch sequence；
During loudness of a sound sequential extraction procedures, first to the vocal signal adding window framing of each music data section, read flat per frame signal
Equal loudness of a sound value of the amplitude as this frame, the voice signal sample rate set are 256 as 6-8kHz sampling numbers, are 12- per frame length
15ms, it is 0 that frame, which moves, extracts loudness of a sound feature to each note of every page of music score of Chinese operas, obtains loudness of a sound sequence；
Contrast judge when, to fix loudness of a sound in duration of a sound sequence units and pitch as benchmark, by the loudness of a sound of performing artist
The arithmetic mean of instantaneous value of sequence and pitch sequence is regular to be arrived and the loudness of a sound and the arithmetic mean of instantaneous value of pitch in fixed duration of a sound sequence units
In same horizontal line, cosine similarity formula sim is utilizedij=cos θ calculate the trend of two groups of data in two-dimensional space vector,
According to the ratio a% of similarity, microprocessor is identified using a values as judgment basis to playing content, sets A=70, when
Without page turn over operation, when similarity is greater than or equal to 70%, microprocessor hair when duration of a sound sequence display degree is not up to 70%
Go out control signal control display screen page turning；During practice, due to there is substantial amounts of trifle to need to repeat, B=50 is set,
When the pitch loudness of a sound phase knowledge and magnanimity of trifle sequence are not up to 50%, microprocessor sends halt signal, system halt duration of a sound sequence
Contrast, trifle alignment continues but rests on the latter trifle of pause node persistently to contrast the trifle, be more than until b values or
Equal to 50, illustrate that player repeats practice previous contents and finishes the next trifle for having been enter into pause node, microprocessor opens again
The contrast of dynamic duration of a sound sequence.
A kind of electronic organ spectrum provided by the invention is described in detail above.The explanation of specific embodiment is only intended to
Help to understand method and its core concept of the invention.It should be pointed out that for those skilled in the art,
Without departing from the principles of the invention, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls
Enter in the protection domain of the claims in the present invention.
Claims (9)
1. a kind of electronic organ spectrum, including music stand (1), it is characterised in that：The music stand (1) is U-shaped structure, the music stand
(1) it is metal framework, mounting hole (11) is offered in the middle part of music stand (1) the right end outer wall, is installed in the mounting hole (11)
There is rubber ring (7), adjustment axis (62) is equipped with the rubber ring (7), connection is equipped with the middle part of music stand (1) the left end inner wall
Column (12), is provided with display device on the music stand (1), and the display device includes outer frame body (21) and display (22),
Outer frame body (21) left and right ends offer connecting hole, and outer frame body (21) the left end connecting hole is set in connecting pole (12)
On, outer frame body (21) the right end connecting hole is set in adjustment axis (62) to be fixedly connected with adjustment axis (62), the music stand
(1) bottom offers accommodating groove (3), and music stand (1) rear and front end opens up jagged (31), institute in accommodating groove (3) bottom
State and stent (4) is installed in accommodating groove (3), the left and right sides of the stent (4) offers magnetic slot, is inlayed in the magnetic slot
Embedded with magnetic steel ingot, stent (4) lower end offers mounting groove (41), and the width dimensions of the mounting groove (41) are equal to notch
(31) width dimensions, stent (4) bottom are provided with base plate (5), and the base plate (5) is equipped with otic placode (51), institute
Otic placode (51) is stated to be hinged in mounting groove (41), the display (22) include display screen, microprocessor, display card, memory,
Sound pick-up, USB interface and battery, the display screen, display card, memory, sound pick-up, USB interface and battery respectively with micro- place
Manage device to be electrically connected, the memory is electrically connected with USB interface, and the display screen is electrically connected with display card；The USB interface is set
Below display screen, the microprocessor, display card, memory are arranged on the back side of display screen.
A kind of 2. electronic organ spectrum according to claim 1, it is characterised in that：Adjustment axis (62) left end installs toothed disc
(63), the toothed disc (63) is integrally formed with adjustment axis (62), offered on outer frame body (1) the right end connecting hole inner wall with
The teeth groove that toothed disc tooth matches, the toothed disc (63) are arranged in teeth groove.
A kind of 3. electronic organ spectrum according to claim 2, it is characterised in that：Adjustment axis (62) right end is equipped with regulating wheel
(61), it is integrally formed on the circumference of the regulating wheel (61) raised (65) equipped with cylinder.
A kind of 4. electronic organ spectrum according to claim 3, it is characterised in that：Regulating wheel (6) the right end end face, which is equipped with, carves
Spend ring, 0 ° of the calibration loop, 90 °, 180 °, 270 ° of positions be equipped with angle mark (64).
5. a kind of electronic organ spectrum according to above-mentioned any one claim further includes a kind of automatic page turning of electronic organ spectrum
Method：
A, a music score of Chinese operas is divided into 1,2,3,4 ... n pages, and carries out with every page music score of Chinese operas contents playing record pitch and loudness of a sound
Stored for a fixed duration of a sound sequence units；
B, real-time duration of a sound sequence is regard the sound progress record buffer memory sent when playing as by digital sound pick-up and is transmitted to rear end
Device microprocessor, microprocessor extracts the fixation duration of a sound sequence units of storage in order and sound pick-up receives the pitch of sound
Contrasted, matched with loudness of a sound；
C, after microprocessor completes the contrast of a fixed duration of a sound sequence units, send a control signal control display screen and play
Lower one page qin spectrum, the then contrast of the next fixed duration of a sound sequence units of repeat step b progress.
A kind of 6. automatic page turning method of electronic organ spectrum according to claim 5, it is characterised in that：The music score of Chinese operas nth page
First segment note, have a repetition embodiment in the last column of page (n-1)th, the part for repeating to embody in nth page not recorded fixation
In duration of a sound sequence units.
A kind of 7. automatic page turning method of electronic organ spectrum according to claim 6, it is characterised in that：The pitch sequence carries
When taking, pitch extraction is carried out using wave files, by vocal signal adding window framing, and by auto-correlation function acf (τ)=
Calculate, then remove excessive or too low peak value, and calculate using semitone=12*log2 (frequency/440)+69
Extreme point, extracts pitch period, obtains pitch sequence.
A kind of 8. automatic page turning method of electronic organ spectrum according to claim 7, it is characterised in that：The loudness of a sound sequence carries
When taking, first to the vocal signal adding window framing of each music data section, sound of the average amplitude per frame signal as this frame is read
Intensity values, the voice signal sample rate set are 256 as 6-8kHz sampling numbers, are 12-15ms per frame length, it is 0 that frame, which moves, to every page
Each note extraction loudness of a sound feature of the music score of Chinese operas, obtains loudness of a sound sequence.
A kind of 9. automatic page turning method of electronic organ spectrum according to claim 8, it is characterised in that：When contrasting judge,
To fix loudness of a sound in duration of a sound sequence units and pitch as benchmark, by the strong sequence of performing artist's performance parts partial and pitch sequence
Arithmetic mean of instantaneous value is regular to on the loudness of a sound and the arithmetic mean of instantaneous value same horizontal line of pitch in fixed duration of a sound sequence units, utilizing
Cosine similarity formulaCalculate two groups of data in two-dimensional space vector
Trend, according to the ratio a% of similarity, is identified to playing content using a values as judgment basis, sets page turning value A, work as a
When value is not up to upper limit A, without page turn over operation.
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| CN201711179989.7A CN107909988A (en) | 2017-11-23 | 2017-11-23 | A kind of automatic page turning method of electronic organ spectrum and electronic organ spectrum |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108766405A (en) * | 2018-06-07 | 2018-11-06 | 肖丹 | A kind of electronic music assisting piano performance |
| CN109036352A (en) * | 2018-06-29 | 2018-12-18 | 广州视源电子科技股份有限公司 | Music score turning method, music score turning device, mobile terminal and storage medium |
| CN112776505A (en) * | 2020-12-18 | 2021-05-11 | 西安文理学院 | Bed book turning frame based on voice control and control method thereof |
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