CN113112971A - Midi defective sound playing method - Google Patents
Midi defective sound playing method Download PDFInfo
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- CN113112971A CN113112971A CN202110338938.4A CN202110338938A CN113112971A CN 113112971 A CN113112971 A CN 113112971A CN 202110338938 A CN202110338938 A CN 202110338938A CN 113112971 A CN113112971 A CN 113112971A
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- bluetooth
- audio software
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- key data
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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
- G10H1/0033—Recording/reproducing or transmission of music for electrophonic musical instruments
- G10H1/0041—Recording/reproducing or transmission of music for electrophonic musical instruments in coded form
- G10H1/0058—Transmission between separate instruments or between individual components of a musical system
- G10H1/0066—Transmission between separate instruments or between individual components of a musical system using a MIDI interface
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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
- G10H1/0033—Recording/reproducing or transmission of music for electrophonic musical instruments
- G10H1/0083—Recording/reproducing or transmission of music for electrophonic musical instruments using wireless transmission, e.g. radio, light, infrared
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10037—A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electrophonic Musical Instruments (AREA)
Abstract
The invention relates to the technical field of Bluetooth data transmission, and particularly discloses a midi defective sound playing method which is used for avoiding the problems of audio software data loss and the like in an intelligent auxiliary participation manner under the condition that data are lost due to Bluetooth instability by arranging a midi signal data restoration algorithm in an audio software host, so that the problem that sound cannot be closed in a specific scene of losing Bluetooth midi signals is solved, the accidents of music software caused by Bluetooth problems are reduced, and meanwhile, the interference of the Bluetooth instability on the Bluetooth can be reduced or avoided in the scene.
Description
Technical Field
The invention relates to the technical field of Bluetooth data transmission, in particular to a midi defective sound playing method.
Background
In the real life, electronic musical instruments are more and more popularized, and can be seen in occasions such as parks, stage performances and the like, along with the popularization and the convenient carrying of Bluetooth, the electronic musical instruments are more and more combined with the Bluetooth, the electronic musical instruments are not interfered by wires to the greatest extent, but the electronic musical instruments are not as much as possible in the aspect of midi electronic signal transmission, under the dual requirements on real-time performance and stability, the Bluetooth also highlights the defects of the electronic musical instruments, occasionally, signal loss can occur to a certain extent under long-time playing, and continuous sound occurs to audio software due to a small part of data until the audio software is closed, so that the operation is extremely inconvenient. Therefore, there is a need for a data processing system associated with midi digital signals to solve the above problems.
Disclosure of Invention
The invention aims to provide a midi aphonia playing method to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a midi aphonia sound playing method comprises the following specific steps:
s1: electronic equipment passes through bluetooth connection audio software host, and the data conversion that bluetooth sent electronic equipment is midi digital signal transmission to audio software host, and the data format that the bluetooth sent is: (-124, -56, -128,45,63, -51, -112,43,630.);
s2: the audio software host splits and analyzes the data sent by the Bluetooth through a data repair algorithm, fixedly discards the first two bits of data in the data group after copying the original data sent by the Bluetooth, and then performs bit operation on the first bit of data in the data group: and carrying key data for controlling the sound size and breath control in the data meeting bit operation: after cc2, cc11, cc7, 80 and 90 are extracted, 2-bit data are cut off in the same direction, and a group of effective key data is obtained: (-128,45, 63);
s3: marking the key data with volume identification, recording the current system time as s, recording the data analysis times as n, skipping data which do not meet the algorithm requirement, and then continuously repeating the operation;
s4: extracting the marked key data through a self-checking module, wherein the extraction period of each time of the key data is defaulted to be 100ms, recording a time mark m carried by the corresponding key data after each time of data extraction, calculating the accumulated time mark m and the recorded times s to obtain an average time value n of data extraction, and recording the average value n; storing the extracted key data which are related to the sound and have volume identification into a data pool;
s5: when the correct data is not analyzed and extracted continuously in the subsequent extraction period or the data is lost due to the instability of Bluetooth transmission, assembling a data group with volume identification from the data pool according to a data format which starts with 80 and has the length of 3 bits, carrying out bit operation on the assembled data, inverting to obtain (-128), and matching the data which also starts with (-128) in the data pool according to (-128), such as (-128,45, 63); when the sound of the audio software needs to be controlled to be closed, only the third digit in the matched array needs to be changed into 0, and the changed data group is sent to the audio software, so that the operation of closing the sound of the audio software is realized; similarly, the rest of the key data for controlling the sound size and breath control: the cc2, cc11, cc7 and cc 90 assist in generating corresponding critical data sets for assisting in sending auxiliary data to restore the relevant critical data to a healthy state.
As a preferable aspect of the present invention, when the playing rhythm of the electronic device is accelerated, the data receiving frequency of the audio software host is accelerated synchronously, and in this case, the average value n is smaller than the default period of 100ms, the extraction period of the key data is replaced with the average value n, and the average value n is synchronized as the time threshold for turning off the sound.
As a preferred scheme of the invention, when the Bluetooth data is normal, the key data is directly forwarded to the audio software through the audio software host.
As a preferred scheme of the invention, when data loss occurs in Bluetooth, the key data is reassembled through a data recovery algorithm, and the assembled data is sent to the audio software in a remote interface callback mode, so that the audio software can mistakenly assume that the electronic equipment continues to send related events, and the audio software is ensured to normally make sound.
As a preferable aspect of the present invention, the electronic device is an electronic musical device including an electronic piano and an electronic saxophone.
As a preferable scheme of the present invention, the music software host is a software terminal device including a mobile phone and a computer.
Compared with the prior art, the invention has the beneficial effects that:
the midi signal data recovery algorithm is arranged in the audio software host of the audio software host, and is used for avoiding the problems of data loss and the like of the audio software in the intelligent auxiliary participation in the behavior of a user under the condition that data is lost due to unstable Bluetooth, so that the problem that the sound cannot be closed under the specific scene of losing the Bluetooth midi signal can be solved, the accidents of the music software caused by the Bluetooth problem can be reduced, and meanwhile, the interference of the unstable Bluetooth on the Bluetooth can be reduced or avoided under the scene.
Drawings
FIG. 1 is an overall workflow diagram of the present invention;
FIG. 2 is a detailed workflow diagram of the data repair algorithm of the present invention;
FIG. 3 is a data processing flow diagram of the data repair algorithm of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1-3, the present invention provides a technical solution: a midi aphonia sound playing method comprises the following specific steps:
s1: electronic equipment passes through bluetooth connection audio software host, and the data conversion that bluetooth sent electronic equipment is midi digital signal transmission to audio software host, and the data format that the bluetooth sent is: (-124, -56, -128,45,63, -51, -112,43,630.);
s2: the audio software host splits and analyzes the data sent by the Bluetooth through a data repair algorithm, fixedly discards the first two bits of data in the data group after copying the original data sent by the Bluetooth, and then performs bit operation on the first bit of data in the data group: and carrying key data for controlling the sound size and breath control in the data meeting bit operation: after cc2, cc11, cc7, 80 and 90 are extracted, 2-bit data are cut off in the same direction, and a group of effective key data is obtained: (-128,45, 63);
s3: marking the key data with volume identification, recording the current system time as s, recording the data analysis times as n, skipping data which do not meet the algorithm requirement, and then continuously repeating the operation;
s4: extracting the marked key data through a self-checking module, wherein the extraction period of each time of the key data is defaulted to be 100ms, recording a time mark m carried by the corresponding key data after each time of data extraction, calculating the accumulated time mark m and the recorded times s to obtain an average time value n of data extraction, and recording the average value n; storing the extracted key data which are related to the sound and have volume identification into a data pool;
s5: when the correct data is not analyzed and extracted continuously in the subsequent extraction period or the data is lost due to the instability of Bluetooth transmission, assembling a data group with volume identification from the data pool according to a data format which starts with 80 and has the length of 3 bits, carrying out bit operation on the assembled data, inverting to obtain (-128), and matching the data which also starts with (-128) in the data pool according to (-128), such as (-128,45, 63); when the sound of the audio software needs to be controlled to be closed, only the third digit in the matched array needs to be changed into 0, and the changed data group is sent to the audio software, so that the operation of closing the sound of the audio software is realized; similarly, the rest of the key data for controlling the sound size and breath control: the cc2, cc11, cc7 and cc 90 assist in generating corresponding critical data sets for assisting in sending auxiliary data to restore the relevant critical data to a healthy state.
As a preferable aspect of the present invention, when the playing rhythm of the electronic device is accelerated, the data receiving frequency of the audio software host is accelerated synchronously, and in this case, the average value n is smaller than the default period of 100ms, the extraction period of the key data is replaced with the average value n, and the average value n is synchronized as the time threshold for turning off the sound.
As a preferred scheme of the invention, when the Bluetooth data is normal, the key data is directly forwarded to the audio software through the audio software host.
As a preferred scheme of the invention, when data loss occurs in Bluetooth, the key data is reassembled through a data recovery algorithm, and the assembled data is sent to the audio software in a remote interface callback mode, so that the audio software can mistakenly assume that the electronic equipment continues to send related events, and the audio software is ensured to normally make sound.
As a preferable aspect of the present invention, the electronic device is an electronic musical device including an electronic piano and an electronic saxophone.
As a preferable scheme of the present invention, the music software host is a software terminal device including a mobile phone and a computer.
The working principle is as follows: in the scheme, a data recovery algorithm of a midi digital signal is added into an audio software host, the midi digital signal sent by the electronic equipment through Bluetooth is analyzed through the data recovery algorithm, key data cc2, cc11, cc7, 80 and 90 for controlling the sound size and breath are extracted, and when a related key value n of the control sound is received, a mark named volume is added to the corresponding key data to record that the electronic equipment sends the midi digital signal, which indicates that the electronic equipment has sound emission;
when the electronic equipment is continuously in the playing state, key data such as cc2, cc11, cc7, 80, 90 and the like are continuously transmitted to the audio software, when the midi digital signal transmission is lost in the middle, the audio software host can not receive the key data of cc2, cc11, cc7, 80 and 90 for a certain period of time, when the self-checking module continuously extracts and self-checks the marked key data in the data pool, if the data updating time exceeds a time threshold n, the key data is subjected to auxiliary processing, the supplementary transmission of the data of cc2, cc11, cc7, 80, 90, etc. (non-electronic device transmission) is carried out under the intervention of the data repair algorithm, so that the audio software mistakes the electronic device to continue transmitting the related events, therefore, the operation of turning off the sound of the audio software is carried out under the condition that the midi digital signal transmission of the Bluetooth is unstable, and the related data are recovered to the health state.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A midi imperfect sound playing method is characterized in that: the method comprises the following specific steps:
s1: electronic equipment passes through bluetooth connection audio software host, and the data conversion that bluetooth sent electronic equipment is midi digital signal transmission to audio software host, and the data format that the bluetooth sent is: (-124, -56, -128,45,63, -51, -112,43,630.);
s2: the audio software host splits and analyzes the data sent by the Bluetooth through a data repair algorithm, fixedly discards the first two bits of data in the data group after copying the original data sent by the Bluetooth, and then performs bit operation on the first bit of data in the data group: the data satisfying the bit operation (128 &0xF0) ((byte) 0x 80) carries key data related to controlling sound size and breath control: after cc2, cc11, cc7, 80 and 90 are extracted, 2-bit data are cut off in the same direction, and a group of effective key data is obtained: (-128,45, 63);
s3: marking the key data with volume identification, recording the current system time as s, recording the data analysis times as n, skipping data which do not meet the algorithm requirement, and then continuously repeating the operation;
s4: extracting the marked key data through a self-checking module, wherein the extraction period of each time of the key data is 100ms by default, recording a time identifier m carried by the corresponding key data after each time of data extraction, calculating the accumulated time identifier m and the recorded times s through m/s-n to obtain an average time value n of data extraction, and recording an average value n; storing the extracted key data which are related to the sound and have volume identification into a data pool;
s5: when the correct data is not analyzed and extracted continuously in the subsequent extraction period or the data is lost due to the unstable Bluetooth transmission, assembling a data group with volume identification from a data pool according to a data format which starts with 80 and has a length of 3 bits, carrying out bit operation on the assembled data, inverting to obtain (-128), and matching the data which starts with (-128) in the data pool according to the (-128); when the sound of the audio software needs to be controlled to be closed, only the third digit in the matched array needs to be changed into 0, and the changed data group is sent to the audio software, so that the operation of closing the sound of the audio software is realized; similarly, the rest of the key data for controlling the sound size and breath control: the cc2, cc11, cc7 and cc 90 assist in generating corresponding key data sets for assisting in sending the key data to restore the key data to a healthy state.
2. The midi music playback method as set forth in claim 1, wherein: when the playing rhythm of the electronic equipment is accelerated, the data receiving frequency of the audio software host is synchronously accelerated, at the moment, the average value n is smaller than the default period of 100ms, the extraction period of the key data is replaced by the average value n, and meanwhile, the synchronization of the average value n is used as the time threshold value for closing the sound.
3. The midi music playback method as set forth in claim 1, wherein: when the Bluetooth data is normal, the key data is directly forwarded to the audio software through the audio software host.
4. The midi music playback method as set forth in claim 1, wherein: when data loss occurs in Bluetooth, key data are reassembled through a data repair algorithm, and the assembled data are sent to audio software in a remote interface callback mode, so that the audio software can mistakenly assume that the electronic equipment continues to send related events, and the audio software is guaranteed to normally make sound.
5. The midi music playback method as set forth in claim 1, wherein: the electronic equipment is electronic music equipment comprising an electronic piano and an electronic saxophone.
6. The midi music playback method as set forth in claim 1, wherein: the music software host is software terminal equipment comprising a mobile phone and a computer.
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| CN202110338938.4A CN113112971B (en) | 2021-03-30 | 2021-03-30 | Midi defective sound playing method |
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| CN202110338938.4A CN113112971B (en) | 2021-03-30 | 2021-03-30 | Midi defective sound playing method |
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