CN108766407B - Audio connection method and device - Google Patents

Audio connection method and device Download PDF

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CN108766407B
CN108766407B CN201810463718.2A CN201810463718A CN108766407B CN 108766407 B CN108766407 B CN 108766407B CN 201810463718 A CN201810463718 A CN 201810463718A CN 108766407 B CN108766407 B CN 108766407B
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audio
transition
bar
section
chord
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CN108766407A (en
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李胜存
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Tencent Music Entertainment Technology Shenzhen Co Ltd
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Tencent Music Entertainment Technology Shenzhen Co Ltd
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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/0008—Associated control or indicating means
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/0008—Associated control or indicating means
    • G10H1/0025—Automatic or semi-automatic music composition, e.g. producing random music, applying rules from music theory or modifying a musical piece
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H2210/00—Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments
    • G10H2210/031—Musical analysis, i.e. isolation, extraction or identification of musical elements or musical parameters from a raw acoustic signal or from an encoded audio signal
    • G10H2210/056—Musical analysis, i.e. isolation, extraction or identification of musical elements or musical parameters from a raw acoustic signal or from an encoded audio signal for extraction or identification of individual instrumental parts, e.g. melody, chords, bass; Identification or separation of instrumental parts by their characteristic voices or timbres
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H2210/00—Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments
    • G10H2210/031—Musical analysis, i.e. isolation, extraction or identification of musical elements or musical parameters from a raw acoustic signal or from an encoded audio signal
    • G10H2210/076—Musical analysis, i.e. isolation, extraction or identification of musical elements or musical parameters from a raw acoustic signal or from an encoded audio signal for extraction of timing, tempo; Beat detection
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H2210/00—Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments
    • G10H2210/101—Music Composition or musical creation; Tools or processes therefor
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H2210/00—Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments
    • G10H2210/101—Music Composition or musical creation; Tools or processes therefor
    • G10H2210/125—Medley, i.e. linking parts of different musical pieces in one single piece, e.g. sound collage, DJ mix
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H2210/00—Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments
    • G10H2210/571—Chords; Chord sequences
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H2240/00—Data organisation or data communication aspects, specifically adapted for electrophonic musical tools or instruments
    • G10H2240/011—Files or data streams containing coded musical information, e.g. for transmission
    • G10H2240/016—File editing, i.e. modifying musical data files or streams as such
    • G10H2240/021—File editing, i.e. modifying musical data files or streams as such for MIDI-like files or data streams
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H2240/00—Data organisation or data communication aspects, specifically adapted for electrophonic musical tools or instruments
    • G10H2240/121—Musical libraries, i.e. musical databases indexed by musical parameters, wavetables, indexing schemes using musical parameters, musical rule bases or knowledge bases, e.g. for automatic composing methods
    • G10H2240/131—Library retrieval, i.e. searching a database or selecting a specific musical piece, segment, pattern, rule or parameter set
    • G10H2240/141—Library retrieval matching, i.e. any of the steps of matching an inputted segment or phrase with musical database contents, e.g. query by humming, singing or playing; the steps may include, e.g. musical analysis of the input, musical feature extraction, query formulation, or details of the retrieval process

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Auxiliary Devices For Music (AREA)

Abstract

The invention discloses an audio connection method and device, and belongs to the field of audio processing. The method includes obtaining a first audio for an audio connection, determining a first transition section in the first audio; determining chord information corresponding to the first transition bar according to the chord configuration information of the first audio; acquiring a second transition bar matched with the first transition bar and a second audio corresponding to the second transition bar from an audio library according to the chord information of the first transition bar; and connecting the first audio and the second audio by adopting a preset transition algorithm based on the first transition section and the second transition section. According to the invention, the two audios are connected in the transition bar with the same chord information, so that the connected audios can meet harmony music theory and accord with auditory sense of music, the purpose of fast and smooth connection of the two audios is achieved, the efficiency and intelligence of audio connection are improved, and the selectable range of the audios is large and the flexibility is good.

Description

Audio connection method and device
Technical Field
The present invention relates to the field of audio processing, and in particular, to an audio connection method and apparatus.
Background
Music compositions include many types, one of which requires linking audio pieces of different songs into one audio, for example, song skewering is one type of music composition.
Taking a song string as an example, the process of connecting two audios of different songs into one audio is generally as follows: the author selects two different audios artificially according to experience, determines a connection point of the two audios according to the artificial experience, and connects the two audios at the connection point through manually operating the recording device or the audio clipping device.
In the process of implementing the invention, the inventor finds that when the prior art is used for connecting different audios, the whole process needs manual operation, and the audio connection method has low efficiency, poor flexibility and insufficient intelligence.
Disclosure of Invention
In order to solve the problems in the prior art, embodiments of the present invention provide an audio connection method and apparatus. The technical scheme is as follows:
in a first aspect, an audio connection method is provided, where the method includes:
acquiring first audio for audio connection, and determining a first transition section in the first audio;
determining chord information corresponding to the first transition bar according to the chord configuration information of the first audio;
acquiring a second transition bar matched with the first transition bar and a second audio corresponding to the second transition bar from an audio library according to the chord information of the first transition bar, wherein the first transition bar and the second transition bar have the same chord information;
and connecting the first audio and the second audio by adopting a preset transition algorithm based on the first transition section and the second transition section.
In one possible implementation manner, for each audio in the audio library, the audio is subjected to chord editing, and chord information of each bar in the audio is obtained.
In one possible implementation, the chord assigning for the audio includes:
carrying out melody recognition on the audio frequency, and determining melody characteristics of the audio frequency;
according to the melody characteristics, carrying out beat recognition on the audio frequency to obtain the beat of the audio frequency;
according to the beat of the audio, carrying out bar division on the audio;
and generating corresponding chord information for each measure of the audio according to the melody characteristics and measure division information of the audio and a preset chord configuration rule.
In one possible implementation, determining a first transition section in the first audio includes:
determining a context location of at least one selectable transition bar in the first audio based on spectral identification information of the first audio;
selecting one of the at least one selectable transition section as the first transition section based on the context location of the at least one selectable transition section.
In one possible implementation, obtaining a second transition bar of a second audio matching the first transition bar from an audio library according to the chord information of the first transition bar includes:
the chord information of the first transition bar is matched with the chord information of the audio contained in the audio library, and a matched transition bar with the same chord information as the first transition bar and a first-level selectable audio corresponding to the matched transition bar are obtained;
and determining the matched transition section as the second transition section, and determining the primary selectable audio as the second audio.
In one possible implementation, obtaining a second transition bar of a second audio matching the first transition bar from an audio library according to the chord information of the first transition bar includes:
the chord information of the first transition bar is matched with the chord information of the audios contained in the audio library, and a plurality of matched transition bars with the same chord information as the first transition bar and a plurality of first-level selectable audios corresponding to the matched transition bars are obtained;
acquiring target selectable audio from the multiple primary selectable audio according to a preset screening condition, wherein the target selectable audio is the primary selectable audio meeting the preset screening condition;
determining the target selectable audio as the second audio, and determining a matching transition section corresponding to the target selectable audio as the second transition section;
wherein the preset screening conditions comprise one or more of the following items: the tone of the audio rhythm is the same, the tone of the audio meets the sub-harmonic condition, the context positions of the transition measures are the same, the beats of the audio are the same, and the beat speed difference of the audio is in a preset range.
In a possible implementation manner, connecting the first audio and the second audio by using a preset transition algorithm based on the first transition section and the second transition section includes:
fading out the first audio in a first mixed section, and fading in the second audio in a second mixed section; or, fade-out the second audio in the second mixed bar, and fade-in the first audio in the first mixed bar;
mixing the first audio and the second audio in the first mixing section and the second mixing section to obtain connected audio;
wherein the first mixed section is the first transition section, and the second mixed section is the second transition section; alternatively, the first hybrid section includes the first transition section and at least one section preceding or following the first transition section, and the second hybrid section includes the second transition section and at least one section preceding or following the second transition section.
In a second aspect, there is provided an audio connection apparatus, the apparatus comprising:
the device comprises an acquisition module, a processing module and a display module, wherein the acquisition module is used for acquiring a first audio for audio connection and determining a first transition section in the first audio;
the determining module is used for determining chord information corresponding to the first transition bar according to the chord configuration information of the first audio;
the matching module is used for acquiring a second transition bar matched with the first transition bar and a second audio corresponding to the second transition bar from an audio library according to the chord information of the first transition bar, and the first transition bar and the second transition bar have the same chord information;
and the transition connection module is used for connecting the first audio and the second audio by adopting a preset transition algorithm based on the first transition section and the second transition section.
In one possible implementation, the apparatus further includes:
and the chord assigning module is used for performing chord assigning on each audio in the audio library to obtain chord information of each bar in the audio.
In one possible implementation, the chord assignment module is configured to: carrying out melody recognition on the audio frequency, and determining melody characteristics of the audio frequency; according to the melody characteristics, carrying out beat recognition on the audio frequency to obtain the beat of the audio frequency; according to the beat of the audio, carrying out bar division on the audio; and generating corresponding chord information for each bar of the audio according to the melody characteristics and bar division information of the audio and a preset chord configuration rule.
In one possible implementation manner, the obtaining module is configured to: determining a context location of at least one selectable transition bar in the first audio based on spectral identification information of the first audio; selecting one of the at least one selectable transition section as the first transition section based on the context location of the at least one selectable transition section.
In one possible implementation, the matching module is configured to: the chord information of the first transition bar is matched with the chord information of the audio contained in the audio library, and a matched transition bar with the same chord information as the first transition bar and a first-level selectable audio corresponding to the matched transition bar are obtained; and determining the matching transition section as the second transition section, and determining the one-stage selectable audio as the second audio.
In one possible implementation, the matching module is configured to: the chord information of the first transition bar is matched with the chord information of the audio contained in the audio library, and a plurality of matched transition bars with the same chord information as the first transition bar and a plurality of primary selectable audios corresponding to the matched transition bars are obtained; acquiring target selectable audio from the multiple primary selectable audio according to a preset screening condition, wherein the target selectable audio is the primary selectable audio meeting the preset screening condition; determining the target selectable audio as the second audio, and determining a matching transition section corresponding to the target selectable audio as the second transition section;
wherein the preset screening conditions comprise one or more of the following items: the tone of the audio melody is the same, the tone of the audio meets the sub-harmonious condition, the context positions of the transition bars are the same, the beats of the audio are the same, and the beat speed difference of the audio is within the preset range.
In one possible implementation, the transition connection module is configured to:
fading out the first audio in a first mixed section, and fading in the second audio in a second mixed section; or, fade-out the second audio in the second mixed bar, and fade-in the first audio in the first mixed bar;
mixing the first audio and the second audio in the first mixing section and the second mixing section to obtain connected audio;
wherein the first mixed section is the first transition section, and the second mixed section is the second transition section; alternatively, the first hybrid section includes the first transition section and at least one section preceding or following the first transition section, and the second hybrid section includes the second transition section and at least one section preceding or following the second transition section.
In a third aspect, a computer device is provided, which includes a processor and a memory, where at least one instruction is stored in the memory, and the instruction is loaded and executed by the processor to implement the operations performed in the first aspect and any possible implementation manner of the first aspect.
In a fourth aspect, a computer-readable storage medium is provided, wherein at least one instruction is stored in the storage medium, and the instruction is loaded and executed by a processor to implement the operations as performed in the first aspect and any possible implementation manner of the first aspect.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the chord information of the audio transition bar is utilized, the transition bar with the same chord information is matched in the audio library, and the two audios are connected at the transition bar with the same chord information, so that the connected audio can meet harmony music theory and accord with auditory music, the purpose of fast and smooth connection of the two audios is achieved, the efficiency and intelligence of audio connection are improved, the selectable range of the audio is large, and the flexibility is good.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of an audio connection method according to an embodiment of the present invention;
fig. 2 is a flowchart of an audio connection method according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of chord assignments and spectral information for a song audio provided by an embodiment of the invention;
fig. 4 is a block diagram of an audio connection apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a server according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a flowchart of an audio connection method according to an embodiment of the present invention, as shown in fig. 1, including the following steps:
101. a first audio for an audio connection is obtained and a first transition section is determined in the first audio.
102. And determining chord information corresponding to the first transition bar according to the chord configuration information of the first audio.
103. And acquiring a second transition bar matched with the first transition bar and a corresponding second audio from an audio library according to the chord information of the first transition bar, wherein the first transition bar and the second transition bar have the same chord information.
104. And connecting the first audio and the second audio by adopting a preset transition algorithm based on the first transition section and the second transition section.
The method provided by the embodiment of the invention utilizes the chord information of the audio transition bar to match the transition bar with the same chord information in the audio library, and connects the two audios in the transition bar with the same chord information, so that the audio obtained by connection can meet harmony and music theory and accord with auditory music, the purpose of fast and smooth connection of the two audios is achieved, the efficiency and intelligence of audio connection are improved, the selectable range of the audio is large, and the flexibility is good.
In one possible implementation, for each audio in the audio library, the audio is chord-coded, and chord information of each bar in the audio is obtained.
In one possible implementation, chord assigning is performed on the audio, and includes:
carrying out melody recognition on the audio frequency, and determining melody characteristics of the audio frequency;
according to the melody characteristics, carrying out beat recognition on the audio frequency to obtain the beat of the audio frequency;
according to the beat of the audio, carrying out bar division on the audio;
and generating corresponding chord information for each bar of the audio according to the melody characteristics and bar division information of the audio and a preset chord configuration rule.
In one possible implementation, determining a first transition section in the first audio includes:
determining a context location of at least one selectable transition bar in the first audio based on the spectral signature information of the first audio;
selecting one of the at least one selectable transition section as the first transition section based on the context location of the at least one selectable transition section.
In one possible implementation, obtaining a second transition bar of a second audio matching the first transition bar from an audio library based on the chord information of the first transition bar includes:
the chord information of the first transition bar is matched with the chord information of the audio contained in the audio library, and a matched transition bar with the same chord information as the first transition bar and a first-level selectable audio corresponding to the matched transition bar are obtained;
and determining the matching transition section as the second transition section, and determining the one-stage selectable audio as the second audio.
In one possible implementation, obtaining, from an audio library, a second transition section of a second audio that matches the first transition section according to the chord information of the first transition section includes:
the chord information of the first transition bar is matched with the chord information of the audio contained in the audio library, and a plurality of matched transition bars with the same chord information as the first transition bar and a plurality of primary selectable audios corresponding to the matched transition bars are obtained;
according to a preset screening condition, acquiring a target selectable audio from the multiple primary selectable audios, wherein the target selectable audio is the primary selectable audio meeting the preset screening condition;
determining the target selectable audio as the second audio, and determining a matching transition section corresponding to the target selectable audio as the second transition section;
wherein the preset screening conditions include one or more of the following items: the tone of the audio melody is the same, the tone of the audio meets the sub-harmonious condition, the context positions of the transition bars are the same, the beats of the audio are the same, and the beat speed difference of the audio is within the preset range.
In a possible implementation manner, connecting the first audio and the second audio by using a preset transition algorithm based on the first transition section and the second transition section includes:
fade-out the first audio in a first mixed section, and fade-in the second audio in a second mixed section; or, fade-out the second audio in the second mixed bar, fade-in the first audio in the first mixed bar;
mixing the first audio and the second audio in the first mixing section and the second mixing section to obtain connected audio;
wherein the first mixed section is the first transition section, and the second mixed section is the second transition section; alternatively, the first hybrid section includes the first transition section and at least one section preceding or following the first transition section, and the second hybrid section includes the second transition section and at least one section preceding or following the second transition section.
All the above optional technical solutions may be combined arbitrarily to form the optional embodiments of the present disclosure, and are not described herein again.
Before describing the detailed embodiment of the present invention, the following steps 201 to 205 are used to explain the execution subject and application scenario of the audio connection process:
the following main execution body of the whole process is a server, and one application scenario can be that the server adopts the method to connect smoothly-connected audios in a music library to obtain a plurality of connected audios, and for music applications, the server provides services for browsing, playing and downloading a large number of self-made string-burned songs for the music applications. In another application scenario, the server may interact with the user terminal, for example, in step 203, the first audio may be selected by the user and uploaded to the server by the user terminal, and the server obtains the first audio from the user terminal and connects the audio matched with the audio selection provided by the user by using the above method; in this scenario, a service for personalized customized song burns may be provided to the music class application server, and the service is presented to the user through the user terminal.
Fig. 2 is a flowchart of an audio connection method according to an embodiment of the present invention, and referring to fig. 2, the method includes the following steps:
201. and performing chord configuration on each audio in the audio library to obtain chord information of each bar in the audio.
In the embodiment of the present invention, the audio library includes a large number or mass of music files, and each music file is referred to as an audio in the embodiment. The file format of the audio may include WAV, MP3, WAM, MID, etc., which is not limited in this embodiment. The music files include song files, pure music files, and the like, and the content of the music files is not limited in this embodiment.
The process of chord configuration for each audio in the audio library comprises the following steps a1 to a4:
step a1, carrying out melody recognition on the audio frequency, and determining the melody characteristics of the audio frequency.
The method comprises the following steps: carrying out main melody recognition on the audio frequency to obtain main melody information of the audio frequency; and determining the tone of the audio according to the main melody information of the audio.
Wherein, the melody characteristics of the audio comprise the main melody information of the audio and the tonality of the audio.
After the main melody recognition is carried out on the audio, a note file corresponding to the audio can be generated, and the note file comprises a duration value of each note in the audio, pitch information of each note and intensity information of each note. The duration of the note represents the duration of the beat of the note, for example, the duration of the note is one beat, one-half beat, or the like. Of course, if the note file corresponding to the audio already exists in the audio library, the main melody recognition step may be skipped, and the main melody information of the audio may be directly obtained according to the known note file. Note that the information included in the Note file is collectively referred to as main melody information of the audio.
The process of determining the tone quality may include: and determining the tone of the audio by adopting a preset tone recognition algorithm according to the main melody information of the audio. The process of presetting the tonality identification algorithm may be to determine the key of the audio by using the audio start note (or end note); and determining the tonality of the audio according to the pitch of the primary note and the interval relation between the primary note and the adjacent notes. For example, the audio start note or the end note is 1 (do), if the pitch of 1 is C and the interval relation between adjacent notes is a major interval-full half full half, then the tonality of the audio is C major.
And a2, carrying out beat identification on the audio frequency according to the melody characteristics of the audio frequency to obtain the beat and the speed of the audio frequency.
Wherein, the process of carrying out beat recognition on the audio comprises the following steps: obtaining the time value and the strength relation of continuous notes in the audio according to the melody characteristics of the audio; matching the duration and the strength relation of the continuous notes with preset beat classification information to obtain the beat of the audio; the ratio of the total duration of the consecutive notes to the total duration is determined as the speed of the audio.
The preset beat classification information comprises a plurality of beats and a matching condition corresponding to each beat, and when the time value and the strength relation of the continuous note meet a certain matching condition, the beat corresponding to the matching condition is determined as the beat of the audio. The preset beat classification information may be a corresponding relationship as shown in table 1, but is not limited to the limitation of the classification shown in table 1, and for example, the classification may also include a mixed beat. It should be noted that, in the matching process, the number of the continuous notes can be flexibly adjusted according to the number of the notes indicated in the beat classification information, so that the numbers of the notes of the two parties are the same.
TABLE 1
Figure BDA0001661537660000091
The speed of the audio refers to the rate of the beat of the audio, for example, 88 beats per minute, 88 half notes per minute, etc.
It should be noted that if it is detected that the audio has a corresponding midi file, the step of identifying in step 2 is not performed any more, and the tempo and speed of the audio are directly extracted from the midi file of the audio. Wherein, the midi file comprises the beat information and the speed information of the audio.
And a3, carrying out bar division on the audio according to the beat of the audio.
For example, if the beat of the audio is four beats, a bar is divided every 4 beats with a 4-division note as one beat, and a bar mark is added to the audio.
And a4, generating corresponding chord information for each bar of the audio according to the melody characteristics and bar division information of the audio and a preset chord configuration rule.
In this embodiment, the server determines each section included in the audio according to the section division information, for example, determines each section included in the audio according to the section mark. For each bar, the process of chord assigning the bar to generate chord information of the bar includes: and generating the chord information of the bar according to the tone of the audio and a preset chord allocation rule.
The preset chord configuration rule includes, but is not limited to, the following rules: 1. the major tone audio is used for editing major chords, and the minor tone audio is used for editing minor chords; 2. the initial bar and the final bar are assigned a major chord. 3. A bar before the end is assigned to the seventh chord or chord, e.g., major G7, or G, minor E7 or Em; 4. the former chord of the Chinese character 'zhuqi' chord should be matched with the subordinate chord; 5. note melodies within bars have a clear tendency for a chord to be matched by the chord.
It should be noted that the preset chord allocation rule includes the characteristics of the note melody of a measure and the transition relationship between the measure and the adjacent measure.
It should be noted that, the server stores the chord configuration information of each audio correspondingly, and the chord configuration information of the audio includes the context position of each bar and the corresponding chord information.
202. A first audio for an audio connection is obtained and a first transition bar is determined in the first audio.
In this embodiment, the determination of the first audio includes the following three implementations:
in a first embodiment, the first audio is randomly selected from an audio library.
In a second embodiment, the audio library comprises a hit music library, and the audio is selected from the hit music library as the first audio. For example, audio connection may be performed on each audio in a popular music library, and in specific implementation, audio connection processing may be performed on multiple audios at the same time.
In a third mode, the first audio is selected from an audio library by a user, namely, the audio which is selected by the user and needs to be subjected to audio connection is taken as the first audio; the audio which needs to be connected with the audio and is uploaded by the user from the local can be used as the first audio. It should be noted that, when the first audio is uploaded by the user, the chord assignment is performed on the first audio according to the method similar to step 201.
In the present embodiment, the process of determining the first transition section in the first audio is: determining a contextual location of at least one selectable transition bar in the first audio based on the spectral identification information of the first audio; one of the at least one selectable transition section is selected as a first transition section based on the context location of the at least one selectable transition section.
It should be noted that the music library may further store spectral identification information corresponding to each audio, where the spectral identification information of each audio at least includes a context label of at least one selectable transition section in the audio. A context token for a selectable transition section is used to indicate a start time point and an end time point of the selectable transition section, the context token being used to indicate a context location of the selectable transition section in the audio. For example, the context token may be in the form of 1 minute 50 seconds to 1 minute 57 seconds. The context label may be added manually or automatically according to a preset algorithm, which is not limited in this embodiment.
Wherein the process of the server determining at least one selectable transition bar from the first audio comprises: the server acquires spectrum identification information corresponding to the first audio, and takes a starting time point and an ending time point indicated by the context label as context positions of the selectable transition sections according to the context label of at least one selectable transition section in the spectrum identification information.
Among them, the types of selectable transition measures may include, but are not limited to, turning into a refrain, a prelude whirlpool, a primer double, etc. that are easy to make an audio connection that conforms to human ear. The spectral signature information may also include type information for optional transition measures. In this embodiment, when there are a plurality of selectable transition sections determined in the first audio, the manner of selecting one transition section as the first transition section may include the following two ways: in the first way, one is randomly selected from a plurality of selectable transition measures. In a second mode, the selectable transition section with the highest type priority among the plurality of selectable transition sections is taken as the first transition section according to the type information and the type priority of the selectable transition sections in the spectrum identification information. Wherein, the priority of different types of selectable transition bars can be preset, and the sort condition of the type priority can be different for the audios of different melodies.
It should be noted that the type and context label of all sections in the audio can also be included in the spectrum identification information. The spectrum identification information may be automatically generated by the server according to the audio measure division information and the melody characteristics, or may be uploaded to the server after being manually edited, or may be automatically generated by the server and then manually checked and modified to generate final spectrum identification information, and the generation manner of the spectrum identification information is not limited in this embodiment.
203. And determining chord information corresponding to the first transition bar according to the chord configuration information of the first audio.
In the present embodiment, the server performs matching in the chord arrangement information of the first audio in accordance with the context position of the first transition bar, and takes chord information satisfying the context position as chord information of the first transition bar.
204. And acquiring a second transition section matched with the first transition section and a corresponding second audio from the audio library according to the chord information of the first transition section.
Wherein the first transition bar and the second transition have the same chord information.
In the embodiment of the present invention, this step includes the following two embodiments:
in the first embodiment, the process of obtaining, from the audio library, the second transition bar matching the first transition bar and the second audio corresponding to the second transition bar according to the chord information of the first transition bar includes: the chord information of the first transition bar is matched with the chord information of the audio contained in the audio library, and a matched transition bar with the same chord information as the first transition bar and a first-level selectable audio corresponding to the matched transition bar are obtained; and determining the matched transition section as a second transition section, and determining the one-stage selectable audio as a second audio.
It should be noted that, for each audio included in the audio library, the audio library stores the corresponding relationship between the chord information of all the bars of the audio and the audio.
It should be noted that, in this embodiment, when the server obtains a matching result, the server stops continuing matching, directly determines the matched transition bar obtained by matching as the second transition bar, performs matching through bar chord information, can quickly locate the second transition bar with the same chord information, and further determines the corresponding second audio, so that matching efficiency is enhanced, and real-time audio matching can be realized. Of course, after a matching result is obtained, matching can be continued to obtain a plurality of matching results, so that a plurality of second transition measures and a plurality of corresponding second audios are obtained, and then the first audio and the plurality of different second audios can be subjected to audio connection, so that a plurality of different audio connection effects based on harmony music theory and according with auditory music feeling are obtained.
It should be noted that, in the matching process, matching may be performed in the order of the audio heat in the audio library from high to low, so that the result of the audio connection is enjoyed by more users.
In the second embodiment, the process of obtaining the second transition bar matching the first transition bar and the corresponding second audio from the audio library according to the chord information of the first transition bar comprises: the chord information of the first transition bar is matched with the chord information of the audios contained in the audio library, and a plurality of matched transition bars with the same chord information as the first transition bar and a plurality of first-level selectable audios corresponding to the matched transition bars are obtained; acquiring target selectable audio from a plurality of first-level selectable audio according to a preset screening condition, wherein the target selectable audio is the first-level selectable audio meeting the preset screening condition; and determining the target selectable audio as a second audio, and determining the matching transition section corresponding to the target selectable audio as a second transition section.
The preset screening conditions comprise one or more of the following items: the tone of the audio melody is the same, the tone of the audio meets the sub-harmonious condition, the context positions of the transition bars are the same, the beats of the audio are the same, and the beat speed difference of the audio is within the preset range.
The first is that the musical scale of the audio is the same but the tone of the audio is different, namely the musical scale sequences of the two audios are the same but the tone of the two audios are different, for example, the musical scale sequences of C major and Am minor are the same; the second type refers to the tones of the fifth harmonic, such as the major key of C and the major key of G, which is the fifth harmonic of C.
The difference between the audio tempo and the tempo within the preset range means that the tempo of the two audio signals is the same or similar, such as 96 beats per minute and 92 beats per minute. Two audios with similar beat speeds are more harmonious to be connected. The preset range may be determined according to the discrimination of the human ear to the beat speed, or may be preset or modified according to experience, which is not limited in this embodiment.
The above steps are further explained below with reference to fig. 3:
fig. 3 is a schematic diagram showing chord allocation and spectral information of a song audio. As can be seen from fig. 3, the tone of the audio is a major and the tempo is four beats, where the first beat of each bar is a double beat. The chord assigned to each bar is identified on each bar, e.g., A, bm, D, E, A7, etc. For example, in the first audio represented in fig. 3, the first bar (i.e., the 17 th bar) shifted into the refrain is selected as the first transition bar, and the chord information of the first transition bar is the E chord, and when matching is performed in the music library, the matching transition bar that is also the E chord is selected. In one embodiment, the matching transition measure is taken as a second transition measure; and splicing and connecting the first audio and a second audio corresponding to the matched transition section in the determined transition section. Further, in another embodiment, when performing audio matching, if the factors such as the tonality, the tempo, the speed, and the contextual location of the transition bar of the audio are taken into consideration, a more harmonious audio melody can be matched. That is, the preset screening condition is set as a matching condition. In specific implementation, one of the preset screening conditions may be selected for matching, or multiple of the preset screening conditions may be selected for matching, and when the selected second audio meets the conditions of the preset screening conditions, the smooth transition sense of the connection between the first audio and the second audio is stronger, so that the sense of incongruity of the connection result is reduced.
205. And connecting the first audio and the second audio by adopting a preset transition algorithm based on the first transition section and the second transition section.
In the present embodiment, this step includes the following steps b1 and b2:
step b1, performing fade-out processing on the first audio in the first mixed section, and performing fade-in processing on the second audio in the second mixed section; or, fade-out the second audio in the second mixing section, and fade-in the first audio in the first mixing section.
The fade-in processing means that the loudness of the audio starts from 0, gradually changes from weak to strong according to a certain step length, stops changing when the original loudness of the audio is reached, namely, the volume of the audio gradually changes from zero to zero and gradually increases from small to large from the perspective of the hearing of a user, and then one volume is kept for continuous playing. The fade-out processing refers to gradually weakening the loudness of the audio from strong to 0 according to a certain step length, and gradually reducing the volume of the audio from the original volume and finally disappearing from the perspective of the hearing of a user.
And b2, mixing the first audio and the second audio in the first mixing section and the second mixing section to obtain connected audio.
In the first embodiment, the first mixed section is a first transition section, and the second mixed section is a second transition section, that is, the connection mode is to perform transition connection in the transition section. In a second embodiment, the first hybrid section includes the first transition section and at least one section preceding or following it, and the second hybrid section includes the second transition section and at least one section preceding or following it. The second embodiment is to perform extended connection on adjacent sections of the transition section, and includes five cases, which are respectively: 1. the first hybrid section includes a first transition section and at least one section preceding it, and the second hybrid section includes a second transition section and at least one section preceding it. 2. The first hybrid section includes a first transition section followed by at least one section, and the second hybrid section includes a second transition section followed by at least one section. 3. The first hybrid section includes a first transition section and at least one section preceding it, and the second hybrid section includes a second transition section and at least one section following it. 4. The first hybrid section includes a first transition section followed by at least one section, and the second hybrid section includes a second transition section followed by at least one section. 5. The first hybrid section includes a first transition section and at least one section preceding it and at least one section following it, and the second hybrid section includes a second transition section and at least one section preceding it and at least one section following it.
It should be noted that, in the step b1, when the first audio and the second audio are connected, the first audio may be placed in front of the second audio, or the second audio may be placed in front of the first audio, and this embodiment does not limit the order of connecting the two audios.
The method provided by the embodiment of the invention utilizes the chord information of the audio transition bar to match the transition bar with the same chord information in the audio library, and connects the two audios in the transition bar with the same chord information, so that the audio obtained by connection can meet harmony and music theory and accord with auditory music, the purpose of fast and smooth connection of the two audios is achieved, the efficiency and intelligence of audio connection are improved, the selectable range of the audio is large, and the flexibility is good.
Furthermore, on the basis of chord matching of transition bars, factors such as tone, beat speed and context positions of the transition bars are brought into the matching condition, so that smooth transition sense of connection of the two audio frequencies is further increased, and the sense of incongruity of the connection result is reduced.
Fig. 4 is a block diagram of an audio connection apparatus according to an embodiment of the present invention, as shown in fig. 4, including an obtaining module 401, a determining module 402, a matching module 403, and a transition connection module 404.
The acquisition module is used for acquiring a first audio connected with the audio and determining a first transition section in the first audio; the determining module is used for determining chord information corresponding to the first transition bar according to the chord configuration information of the first audio; the matching module is used for acquiring a second transition bar matched with the first transition bar and a second audio corresponding to the second transition bar from an audio library according to the chord information of the first transition bar, wherein the first transition bar and the second transition bar have the same chord information; and the transition connection module is used for connecting the first audio and the second audio by adopting a preset transition algorithm based on the first transition section and the second transition section.
In one possible implementation, the apparatus further includes:
and the chord assigning module is used for performing chord assigning on each audio in the audio library to obtain chord information of each bar in the audio.
In one possible implementation, the chord assignment module is configured to: carrying out melody recognition on the audio frequency, and determining melody characteristics of the audio frequency; according to the melody characteristics, carrying out beat recognition on the audio frequency to obtain the beat of the audio frequency; according to the beat of the audio, carrying out bar division on the audio; and generating corresponding chord information for each bar of the audio according to the melody characteristics and bar division information of the audio and a preset chord configuration rule.
In one possible implementation manner, the obtaining module is configured to: determining a context location of at least one selectable transition bar in the first audio based on the spectral signature information of the first audio; selecting one of the at least one selectable transition section as the first transition section based on the context location of the at least one selectable transition section.
In one possible implementation, the matching module is configured to: the chord information of the first transition bar is matched with the chord information of the audio contained in the audio library, and a matched transition bar with the same chord information as the first transition bar and a first-level selectable audio corresponding to the matched transition bar are obtained; and determining the matching transition section as the second transition section, and determining the one-stage selectable audio as the second audio.
In one possible implementation, the matching module is configured to: the chord information of the first transition bar is matched with the chord information of the audio contained in the audio library, and a plurality of matched transition bars with the same chord information as the first transition bar and a plurality of primary selectable audios corresponding to the matched transition bars are obtained; according to a preset screening condition, acquiring a target selectable audio from the multiple primary selectable audios, wherein the target selectable audio is the primary selectable audio meeting the preset screening condition; determining the target selectable audio as the second audio, and determining a matching transition section corresponding to the target selectable audio as the second transition section;
wherein the preset screening conditions include one or more of the following items: the tone of the audio melody is the same, the tone of the audio meets the sub-harmonious condition, the context positions of the transition bars are the same, the beats of the audio are the same, and the beat speed difference of the audio is within the preset range.
In one possible implementation, the transition connection module is configured to:
fade-out the first audio in a first mixed section, and fade-in the second audio in a second mixed section; or, fade-out the second audio in the second mixed bar, fade-in the first audio in the first mixed bar;
mixing the first audio and the second audio in the first mixing section and the second mixing section to obtain connected audio;
wherein the first mixed section is the first transition section, and the second mixed section is the second transition section; alternatively, the first hybrid section includes the first transition section and at least one section preceding or following it, and the second hybrid section includes the second transition section and at least one section preceding or following it.
The device provided by the embodiment of the invention utilizes the chord information of the audio transition bar to match the transition bar with the same chord information in the audio library, and connects the two audios in the transition bar with the same chord information, so that the connected audios can meet harmony and musical theory and accord with auditory music, the purpose of fast and smooth connection of the two audios is achieved, the efficiency and intelligence of audio connection are improved, the selectable range of the audios is wide, and the flexibility is good.
It should be noted that: in the audio connection apparatus provided in the foregoing embodiment, when performing audio connection, only the division of the above functional modules is illustrated, and in practical applications, the above functions may be distributed by different functional modules according to needs, that is, the internal structure of the server is divided into different functional modules, so as to complete all or part of the above described functions. In addition, the audio connection device and the audio connection method provided by the above embodiments belong to the same concept, and specific implementation processes thereof are described in the method embodiments and are not described herein again.
Fig. 5 is a schematic structural diagram of a server according to an embodiment of the present invention, where the server 500 may generate a relatively large difference due to different configurations or performances, and may include one or more processors (CPUs) 501 and one or more memories 502, where the memory 502 stores at least one instruction, and the at least one instruction is loaded and executed by the processors 501 to implement the methods provided by the above method embodiments. Of course, the server may also have components such as a wired or wireless network interface, a keyboard, and an input/output interface, so as to perform input/output, and the server may also include other components for implementing the functions of the device, which are not described herein again.
In an exemplary embodiment, a computer-readable storage medium, such as a memory, including instructions executable by a processor in a terminal to perform the audio connection method in the above embodiments is also provided. For example, the computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.

Claims (14)

1. An audio connection method, the method comprising:
acquiring first audio for audio connection, and determining a first transition section in the first audio;
determining chord information corresponding to the first transition bar according to the chord configuration information of the first audio;
acquiring a second transition bar matched with the first transition bar and a second audio corresponding to the second transition bar from an audio library according to the chord information of the first transition bar, wherein the first transition bar and the second transition bar have the same chord information;
connecting the first audio frequency and the second audio frequency by adopting a preset transition algorithm based on the first transition section and the second transition section;
obtaining a second transition bar of a second audio matching the first transition bar from an audio library according to the chord information of the first transition bar, comprising:
the chord information of the first transition bar is matched with the chord information of the audio contained in the audio library, and a plurality of matched transition bars with the same chord information as the first transition bar and a plurality of primary selectable audios corresponding to the matched transition bars are obtained;
acquiring target selectable audio from the multiple primary selectable audio according to a preset screening condition, wherein the target selectable audio is the primary selectable audio meeting the preset screening condition;
determining the target selectable audio as the second audio, and determining a matching transition section corresponding to the target selectable audio as the second transition section;
wherein the preset screening conditions comprise one or more of the following items: the tone of the audio melody is the same, the tone of the audio meets the sub-harmonious condition, the context positions of the transition bars are the same, the beats of the audio are the same, and the beat speed difference of the audio is within the preset range.
2. The method of claim 1, further comprising:
and performing chord configuration on the audio aiming at each audio in the audio library to obtain chord information of each bar in the audio.
3. The method of claim 2, wherein the chord orchestration of the audio comprises:
carrying out melody recognition on the audio frequency, and determining melody characteristics of the audio frequency;
according to the melody characteristics, carrying out beat recognition on the audio frequency to obtain the beat of the audio frequency;
according to the beat of the audio, carrying out bar division on the audio;
and generating corresponding chord information for each bar of the audio according to the melody characteristics and bar division information of the audio and a preset chord configuration rule.
4. The method of claim 1, wherein determining a first transition section in the first audio comprises:
determining a context location of at least one selectable transition bar in the first audio based on spectral identification information of the first audio;
selecting one of the at least one selectable transition section as the first transition section based on the context location of the at least one selectable transition section.
5. The method according to claim 1, wherein obtaining a second transition bar of a second audio matching the first transition bar from an audio library based on the chord information of the first transition bar, further comprises:
the chord information of the first transition bar is matched with the chord information of the audio contained in the audio library, and a matched transition bar with the same chord information as the first transition bar and a first-level selectable audio corresponding to the matched transition bar are obtained;
and determining the matched transition section as the second transition section, and determining the primary selectable audio as the second audio.
6. The method of claim 1, wherein connecting the first audio and the second audio based on the first transition section and the second transition section using a preset transition algorithm comprises:
fading out the first audio in a first mixed section, and fading in the second audio in a second mixed section; or, fade-out the second audio in the second mixed bar, and fade-in the first audio in the first mixed bar;
mixing the first audio and the second audio in the first mixing section and the second mixing section to obtain connected audio;
wherein the first mixed section is the first transition section, and the second mixed section is the second transition section; alternatively, the first hybrid section includes the first transition section and at least one section preceding or following the first transition section, and the second hybrid section includes the second transition section and at least one section preceding or following the second transition section.
7. An audio connection apparatus, the apparatus comprising:
the device comprises an acquisition module, a processing module and a display module, wherein the acquisition module is used for acquiring a first audio for audio connection and determining a first transition section in the first audio;
the determining module is used for determining chord information corresponding to the first transition bar according to the chord configuration information of the first audio;
the matching module is used for acquiring a second transition bar matched with the first transition bar and a second audio corresponding to the second transition bar from an audio library according to the chord information of the first transition bar, wherein the first transition bar and the second transition bar have the same chord information;
the transition connection module is used for connecting the first audio and the second audio by adopting a preset transition algorithm based on the first transition section and the second transition section;
the matching module is used for: the chord information of the first transition bar is matched with the chord information of the audio contained in the audio library, and a plurality of matched transition bars with the same chord information as the first transition bar and a plurality of primary selectable audios corresponding to the matched transition bars are obtained; acquiring target selectable audio from the multiple primary selectable audio according to a preset screening condition, wherein the target selectable audio is the primary selectable audio meeting the preset screening condition; determining the target selectable audio as the second audio, and determining a matching transition section corresponding to the target selectable audio as the second transition section;
wherein the preset screening conditions comprise one or more of the following items: the tone of the audio melody is the same, the tone of the audio meets the sub-harmonious condition, the context positions of the transition bars are the same, the beats of the audio are the same, and the beat speed difference of the audio is within the preset range.
8. The apparatus of claim 7, further comprising:
and the chord assigning module is used for performing chord assigning on each audio in the audio library to obtain chord information of each bar in the audio.
9. The apparatus of claim 8, wherein the chord orchestration module is configured to: carrying out melody recognition on the audio frequency, and determining melody characteristics of the audio frequency; according to the melody characteristics, carrying out beat recognition on the audio frequency to obtain the beat of the audio frequency; according to the beat of the audio, carrying out bar division on the audio; and generating corresponding chord information for each bar of the audio according to the melody characteristics and bar division information of the audio and a preset chord configuration rule.
10. The apparatus of claim 7, wherein the obtaining module is configured to: determining a context location of at least one selectable transition bar in the first audio based on spectral identification information of the first audio; selecting one of the at least one selectable transition section as the first transition section based on the context location of the at least one selectable transition section.
11. The apparatus of claim 7, wherein the matching module is further configured to: the chord information of the first transition bar is matched with the chord information of the audio contained in the audio library, and a matched transition bar with the same chord information as the first transition bar and a first-level selectable audio corresponding to the matched transition bar are obtained; and determining the matched transition section as the second transition section, and determining the primary selectable audio as the second audio.
12. The apparatus of claim 7, wherein the transition connection module is to:
fading out the first audio in a first mixed section, and fading in the second audio in a second mixed section; or, fade-out the second audio in the second mixed bar, and fade-in the first audio in the first mixed bar;
mixing the first audio and the second audio in the first mixing section and the second mixing section to obtain connected audio;
wherein the first mixed section is the first transition section, and the second mixed section is the second transition section; alternatively, the first hybrid section includes the first transition section and at least one section preceding or following the first transition section, and the second hybrid section includes the second transition section and at least one section preceding or following the second transition section.
13. A computer device comprising a processor and a memory, the memory having stored therein at least one instruction that is loaded and executed by the processor to perform operations performed by the audio connection method of any of claims 1-6.
14. A computer-readable storage medium having stored therein at least one instruction that is loaded and executed by a processor to perform operations performed by the audio connection method of any one of claims 1 to 6.
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