Software Design For Correcting Tone And Rhythm Of Singing Voice Automatically On Mobile Phone

Many people like to download singing application on their mobile phones to record songs and upload them which they are satisfied with.However,some of the recorded songs may be out of tone or have an inaccurate rhythm.Although some music editing software can perform post-tone and rhythm correction at present,these softwares generally need to export files and operate on a computer by the man who grasps a certain music knowledge,which has certain operational difficulty and threshold.Therefore,the paper designed an automatic pitch and rhythm correction scheme for mobile phone singing software.After the user finishes recording the song,the automatic correction of the pitch rhythm can be completed by selecting the automatic correction function option,which provides the user with more convenient operation and has certain practical value.The main work of the thesis is as follows:1.Making standard template audio and collecting audio to be corrected: a list of song is prepared,standard audio is collected as template audio according to the list of song,and audio to be corrected is collected as experimental input audio.2.Design the pitch and rhythm automatic correction scheme and experiment: Design a pitch and rhythm correction scheme based on dynamic time warping DTW algorithm and time domain pitch synchronization TD-PSOLA algorithm.The DTW technology is used to align the standard template audio with the audio to be corrected,and then the TD-PSOLA technique is used to perform pitch and rhythm correction on the corrected audio.Finally,the experiment was performed with MATLAB to obtain the corrected audio.3.Technical solution optimization: The audio data acquired after the experiment is analyzed,and objective evaluation and subjective evaluation are performed.According to the evaluation results,the problems are analyzed,and the scheme is further improved and optimized.A dual-mode automatic correction technology scheme is designed.One mode can realize the vibrato in addition to the pitch and rhythm correction.It has the function of realizing the beautification of songs.4.Automatically correct the song sound and rhythm mobile phone software implementation:Firstly,according to the correction technology scheme designed by the paper,design a software scheme suitable for running on the mobile phone,then use C++ code to implement the program,andthen use the relevant tools to package the program code.The library is opened and the corresponding interface is opened.Finally,the mobile phone singing software developer is invited to call the corresponding interface to complete the development of adding the automatic correction function on the mobile phone singing software.