CN116895192A - Stretching method of complex spectrum with auxiliary melody - Google Patents

Abstract

The invention relates to a method for stretching and displaying complex music scores, which includes: acquiring music score data and stretching instructions, traversing all single staffs in the complex music table; and converting the width variable in the stretching instructions according to the number of notes contained in each section. After the numbers are evenly distributed, take the ratio to the original width of the note to obtain the linear stretching ratio of the current single staff; traverse all the measures in the current single staff, modify the original width of the current section with the linear stretching ratio and Add the end point coordinates of a section to get the stretched end point coordinates of the current section; redistribute the coordinates of the symbols in each section; display each section of the stretched single staff and the symbols in it in the interactive window superior. The invention can conveniently and flexibly adjust the stretched (and compressed) lengths of single scores and complex scores including staffs, simplified musical notations and other forms. The finally displayed music scores are accurate, neat and beautiful, and are very suitable for interactive intelligent music teaching equipment.

Description

A stretching method for complex scores with submelody

Technical field

The invention relates to the field of music teaching software, and in particular to a complex spectrum stretching method with submelody.

Background technique

Music teaching under the traditional teaching model is mainly implemented through live demonstrations by teachers. Not only does it require high quality of teachers, but students often lack participation in practical learning. With the integration of information technology, some music teaching software and smart devices with interactive functions have appeared on the market, allowing students to participate more in music learning and experience different learning experiences.

Chinese patent CN 108847207 A proposes an interactive intelligent device for music teaching, which enables an interactive arranging experience when the user needs to make music. However, the existing technology can only display the arranged music score in a relatively fixed form, and the user cannot customize the width of the music score according to the actual display screen size during use. Therefore, there is a need to improve the music score display technology of existing interactive smart devices to achieve a stretched display effect that can be controlled through user instructions, especially for polyphonic music scores.

Contents of the invention

In order to solve the above technical problems, the present invention proposes a complex spectrum stretching method with submelody, which includes the following steps:

Obtain musical score data and stretching instructions, where the musical score data includes a multiple staff table;

Traverse all single staffs in the complex staff, for the current single staff:

Get the initial width of each measure of the current single staff;

After the width variable in the stretching instruction is evenly distributed according to the number of notes contained in each section, the ratio of the width variable to the original width of the note is obtained to obtain the linear stretching ratio of the current single staff;

Traverse all measures in the current single staff, for the current measure:

Modify the original width of the current section by the linear stretch ratio and add a

The end point coordinates of the section are obtained to obtain the end point coordinates of the current section after stretching;

Reassign the coordinates of symbols within each said subsection;

Display each measure of the stretched single staff and its symbols in the interactive window;

The sexual stretch ratio is obtained according to the following calculation formula:

Scale＝(Frame.width-Const.width+Fix.width-XiaoJie.width.sum)/YinFu.width

Among them, Scale represents the linear stretching ratio, Frame.width represents the width of the current single staff, that is, the width of the current line; Const.width represents the key signature and/or time signature width behind the bar line; Fix.wdth represents the submelody. When starting from a certain note of a certain measure, there is a distance in front; Xiaojie.width.sum represents the sum of the widths of all measures in the current line; YinFu.width represents the original occupancy width of each note;

If the current section includes a submelody, traverse the submelody sections, and for the section corresponding to the current section in the submelody section: According to the x coordinate of the current section and the x coordinate of the starting position of the submelody The difference corrects the x-coordinate of each section corresponding to the current section.

The present invention solves the problem for users to achieve customized display effects for music scores, especially polyphonic music scores, in existing interactive intelligent devices, so that the length of the displayed complex scores can be adaptively adjusted according to the size of the interactive window, while ensuring The corresponding measures in each single score of the same complex score and all the notes and other symbols in the measures are aligned and displayed according to their inherent order and inherent rules.

Description of the drawings

Figure 1 is a flowchart of a method for stretching and displaying complex spectra in some embodiments;

Figure 2. Stretch display renderings of some embodiments;

Figure 3. Submelody display renderings of some embodiments;

Figure 4. Schematic diagram of complex spectra of some embodiments.

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the various embodiments involved in the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts should fall within the scope of protection of the present invention.

Some embodiments involve a process flow of a stretched display method of a complex spectrum, as shown in Figure 1, which includes the following steps:

Obtain music score data and stretch instructions. Music score data includes complex staff tables;

Traverse all single staffs in a complex staff, for the current single staff:

Get the initial width of each measure of the current single staff;

After the width variable in the stretch command is evenly distributed according to the number of notes contained in each measure, the ratio of the width variable to the original width of the note is used to obtain the linear stretch ratio of the current single staff;

Traverse all measures in the current single staff, for the current measure:

Modify the original width of the current section with a linear stretching ratio and add the end point coordinates of a section to obtain the stretched end point coordinates of the current section;

Reassign the coordinates of symbols within each section;

Displays each measure of the stretched single staff and its symbols in the interactive window.

It should be further explained that the width variable is determined based on the number of measures in the current line. The width of the current line is fixed. The more measures in the line, the less width can be allocated to the notes in the current measure. When calculating the linear stretch ratio, you need to subtract or add some non-scalable distances in the single staff of the current line (such as clef signature, key signature, time signature, etc.), and add/subtract some correction values according to the requirements of the display situation. , and then obtain the stretching ratio of the note's occupying width. For example, some more specific implementations can obtain the stretching ratio according to the following calculation formula: Scale=(Frame.width-Const.width+Fix.width-XiaoJie.width.sum )/YinFu.width Among them, Scale represents the linear stretching ratio, Frame.width represents the width of the current single staff, that is, the width of the current line; Const.width represents the key signature/time signature after the bar line (the first on the next line When there is a key signature change in a bar, the changed key signature is displayed behind the bar line of the last bar in the previous line. When the time signature is changed in the next line, the new time signature is displayed behind the bar line of the last bar in the previous line.) Width; Fix. wdth represents the distance before the submelody starts from a note in a section; Xiaojie.width.sum represents the sum of the widths of all measures in the current line; YinFu.width represents the original width of each note.

The term "music score data" includes global score data and/or a part of the score data, and the representation forms of this data include (but are not limited to) staffs and simplified musical notations. The "music score data" includes objects in XML format or JSON format. Preferably, the data is saved in JSON format. The JSON object includes a global musical score class. The data of each global musical score class includes an array composed of several data of the complex staff class. Each complex staff class data includes several arrays. An array composed of single-staff data. Each single-staff data includes an array composed of several measures of data. Among them: some measure-type data includes several parts, and some measure-type data includes submelody corresponding to the measure. data. The following is an example of a specific description of the fields of some JSON data:

Music score XML files have been widely used in the industry, and music score JSON files have just begun. However, in the specific field of Ajax, future development must be that music score XML files give way to music score JSON files. Compared with music score XML files, music score JSON files have smaller data size. The interaction between music score JSON files and JavaScript is more convenient, and the reading and search speed are much faster than the music score XML files.

The stretching effect of the embodiment involved is shown in Figure 2. It can be seen that the original dense musical score is displayed as a sparse musical score after the isometric stretching display, and the size, order and relative position of each note are represented. No change. Obviously, the technical solution of the present invention can also realize the reverse operation of stretching, that is, the length of the original musical score can be compressed in equal proportions and then displayed.

The term "stretch command" mainly refers to the user's input command through the use of keyboard, mouse movement and other devices, including dragging the display object of the stretched music score; through this command program, you can obtain information including (but not Limited to) data of the moving width of the display object of the stretched musical score.

The term "polyphonic score" refers to the score of polyphonic music.

In some embodiments, the step of redistributing the coordinates of symbols within each section specifically includes: obtaining the x-coordinate and width of the first symbol in the current section, where the symbols include time signatures, key signatures, and notes;

Store the maximum x-coordinate Max1 of all the time signatures of the section in the current complex staff. If the current section has different key signatures from its corresponding sections in other single staffs of the complex staff, then all the time signatures of all sections will be stored. The time signature is aligned according to the Max1;

Store the maximum x-coordinate value Max2 of the first note of the section in the current complex staff. If the current section is different from the key signature of its corresponding section in other single staffs of the current complex staff, then The first notes of all bars are aligned according to Max2;

According to the stretched width of the current section and the x-coordinate and width of the initial symbol in the current section, the x-coordinate and width values of all symbols in the current section are updated accordingly.

The method involved in some embodiments also includes: if the current section includes a submelody, traverse the submelody sections, and for the section corresponding to the current section in the submelody section: according to the x coordinate of the current section and the x coordinate of the starting position of the submelody. The difference corrects the x-coordinate of each bar corresponding to the current bar.

When it is necessary to display the corresponding submelody section (as shown in Figure 3), it is usually necessary to consider adaptively adjusting the stretch width of each section to ensure that the corresponding submelody section can be displayed normally. Among them, a section with a submelody has a corresponding relationship with its submelody. After adjusting the display coordinate value of the section, the submelody bound to the section is adjusted according to its internal corresponding relationship.

The method involved in some embodiments also includes: if the current section includes several voices, traverse all the voices: store the number of voices and the maximum value of the x-coordinate of the symbol in the voice of the current section; calculate each voice according to the sexual stretching ratio. The stretch width of the voice.

The method involved in some embodiments further includes: if there is grace note in the first symbol in the current measure, setting the grace note width in all the voices in the current measure.

The method involved in some embodiments further includes: updating the starting x coordinate value of each section that requires paragraph distinction.

Some more specific implementations also include: adjusting the width variable in the score stretching instruction according to the displayed threshold, the displayed width threshold of the submelody corresponding to the current measure of the score, and other constant values.

Some more specific implementations also include; if there is more than one section in the musical score complex that needs to be stretched, then after processing the x-coordinates of all the sections that need to be stretched in the musical score, update the musical score complex in the interactive window. display in the complex staff; if there is only one section in the complex staff that needs to be stretched, the display of the complex staff in the interactive window will be updated after processing the section.

Some more specific embodiments involve a complex score, in which the notes are divided into notes of different durations, usually divided into whole notes, half notes, quarter notes, eighth notes, sixteenth notes, and so on; each piece The score has a time signature as the playback duration of the notes in each measure. For example, in the staff in Figure 4, the content at the beginning of the measure is the clef, the key signature (#), and the time signature (3/4), where 3/4 represents the current A measure is a score of four or three beats, so the value of the notes in the current measure must add up to the length of four or three beats. For example, in the first measure, the content of the first line is a whole note rest, and the whole note means that the current note must fill the entire length. The length of this entire measure, the second line of the first measure, the notes in it are quarter notes, and the duration of each note is a quarter beat, so in the measure of 43 beats, put three quarter notes, three The total duration of the quarter notes should add up to the duration of the four and three beats. Each line of music is represented by a single staff, and the music enclosed by curly braces represents a complex staff. In the current example, each complex staff contains two single staffs (each single staff is played as the main melody). The single staff in a row is divided into four measures. The vertical lines in the row are called bar lines to separate the measures in each row. The number of measures in each compound staff is equal. For example, the first line of single staff in the example The number of measures in the table should correspond to the number of measures in the second row, and the width of the measures should also correspond well. It only needs to correspond to the current complex staff table. Different complex staff tables have different numbers of sections, so in this embodiment No unified correspondence is required.

Some embodiments apply the present invention to a multi-functional digital music teaching system, which can also realize: processing the music score data displayed in multiple lines into playback data; drawing tupple lines according to the positions of the notes in the music score.

Among them, the method of processing the music score data displayed in multiple lines into playback data includes:

Get music score data;

Read the playback command, which includes the starting point and end point information of playback;

Within the interval from the starting point to the end point,

Traverse the lines of the single spectrum marked by the starting point:

Traverse each section in the line: record the order of each section in the current single score;

Iterate over the voices of a measure:

Calculate the order of the notes in each part in the current single spectrum and save the data of the notes in each part in the current playback data in order;

If the current note and the previous note are not in the same complex score, record the sequence of the current note from the beginning;

If there is a symbol in the current part, the playback data of the corresponding note will be processed into a note with a symbol state according to the symbol.

The technical solution of the present invention can conveniently and flexibly adjust the stretched (and compressed) length of single scores and complex scores in the form of staffs and simple notations. The finally displayed music scores are accurate, neat and beautiful, and are very suitable for interactive intelligent music teaching equipment. .

Embodiments of the subject matter described in this specification may be implemented as one or more computer programs, that is, one or more modules of computer program instructions encoded on one or more tangible non-transitory program carriers for data processing. Equipment performs or controls the operation of data processing equipment. A computer program (which may also be called or described as a program, software, software application, module, software module, script or code) may be written in any form of programming language, including a compiled or interpreted language or a declarative language or A procedural language, and a computer program may be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment. A computer program may, but need not, correspond to a file in a file system. Programs may be stored as part of a file that holds other programs or data, for example, as one or more scripts stored: in a markup language document; in a single file dedicated to the related program; or in multiple collaborative A file, for example, a file that stores one or more modules, subroutines, or portions of code. A computer program may be deployed for execution on one computer or on multiple computers, which may be located at one location, or may be distributed across multiple locations and interconnected by a communications network.

The processes and logic flows described in this specification may be performed by one or more programmable computers that execute one or more computer programs to perform functions by operating on input data and generating output. Processing and logic flows may also be performed by, and devices may be implemented as, dedicated logic circuits, such as an FPGA (Field Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit).

A computer suitable for executing a computer program includes and may illustratively be based on a general-purpose microprocessor or a special-purpose microprocessor or both, or any other kind of central processing unit. Typically, the central processing unit will receive instructions and data from read-only memory or random access memory, or both. The main elements of a computer are the central processing unit for running or executing instructions and one or more memory devices for storing instructions and data. Typically, the computer will also include or be operably coupled to receive data from or transfer data to, or both, one or more mass storage devices for storing data. The capacity storage is, for example, a magnetic disk, a magneto-optical disk or an optical disk. Computer-readable media suitable for storage of computer program instructions and data includes all forms of nonvolatile memory, media, and memory devices.

In order to transmit interactions with a user, embodiments of the subject matter described in this specification may be implemented on a computer having a display device, such as a CRT (cathode ray tube) or LCD (liquid crystal display) monitor, for displaying The user displays information; and a keyboard and pointing device such as a mouse or trackball allow the user to send input to the computer. Other kinds of devices can also be used to send interactions with the user; for example, the feedback provided to the user can be any form of sensory feedback, such as visual feedback, auditory feedback, or tactile feedback; and input from the user can be in any form. Received, including sound input, voice input or tactile input.

Embodiments of the subject matter described in this specification may be implemented in a computing system that includes back-end components such as a data server, or includes intermediate components such as an application server, or includes front-end components such as a client computer, The client computer has a graphical user interface or web browser through which a user can interact with implementations of the subject matter described in this specification, or the computer system includes one or more such back-end components , middle components or any combination of front-end components. Components in the system may be interconnected by any form or medium of digital data communication, such as a communications network. Examples of communication networks include local area networks ("LAN") and wide area networks ("WAN"), such as the Internet. The computer system may include clients and servers. Clients and servers are usually remote from each other and often interact through a communications network. The relationship between client and server is created using computer programs running on respective computers and having a client-server relationship with each other.

Although this specification contains many specific implementation details, these should not be construed as limitations on the scope of any invention or on the scope of what may be claimed, but rather as features that may embody specific embodiments of a particular invention. illustrate. Certain features described in this specification in the context of separate implementations can also be implemented in combination with a single implementation. Conversely, various features that are described in the context of a single implementation can also be implemented in multiple implementations independently or in any suitable subcombination. Furthermore, although features may be described above as acting in combination and even initially claimed as such, one or more features from a claimed combination may in some cases be eliminated from that combination and the claimed combination may be diverted to a sub-combination or sub-combinations Deformation.

Claims (2)

1. The complex spectrum stretching method with the auxiliary melody is characterized by comprising the following steps of:

obtaining music score data and stretching instructions, wherein the music score data comprises a double-spectrum table;

traversing all of the staff in the complex staff for the current staff:

acquiring the initial width of each bar of the current single spectrum table;

after the width variable in the stretching instruction is distributed evenly according to the number of notes contained in each bar, the ratio of the width variable to the original occupation width of the notes is taken to obtain the linear stretching proportion of the current single spectrum table;

traversing all bars in the current list, for the current bar:

modifying the original width of the current section according to the linear stretching proportion and adding the end point coordinate of one section to obtain the end point coordinate of the current section after stretching;

reassigning coordinates of symbols within each of the bars;

displaying each bar of the stretched single spectrum table and the symbols in the bar on the interactive window;

the ratio of the obtained stretch was calculated according to the following formula:

Scale＝(Frame.width-Const.width+Fix.width-XiaoJie.width.sum)/YinFu.width

where Scale represents the linear stretch ratio, frame. Width represents the width of the current staff, i.e. the width of the current row; const.width represents the pitch and/or beat width behind the bar line; fix.wdm indicates that the secondary melody is a distance in front of a note of a measure; xiaojie. Width. Sum represents the sum of the widths of all bars in the current row; yinfu.width represents the original space width of each note;

if the current bar comprises a secondary melody, traversing the secondary melody bars, and regarding the bars corresponding to the current bar in the secondary melody bars: correcting the x coordinate of each bar corresponding to the current bar according to the difference between the x coordinate of the current bar and the x coordinate of the starting position of the auxiliary melody.

2. The method of claim 1, further comprising the step of: and adjusting the width variable in the stretching instruction according to the displayed threshold value, the displayed width threshold value of the auxiliary melody corresponding to the current bar and other constant values.