Search - pitch changing

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[Audio program] pitch shift DL : 0: 通过改变频率来改变音乐的音调，升调或降调都可以。另外还有移相（phaser.c)及反相(reverse.c)两个源程序文件-by changing the frequency to change the tone music, or transfer or demotion can. Another phase shifter (phaser.c) and RP (reverse.c) 2 source files
Date : 2008-10-13 Size : 11.84kb User : 张承云
[Audio program] pitch shift DL : 0: 通过改变频率来改变音乐的音调，升调或降调都可以。另外还有移相（phaser.c)及反相(reverse.c)两个源程序文件-by changing the frequency to change the tone music, or transfer or demotion can. Another phase shifter (phaser.c) and RP (reverse.c) 2 source files
Date : 2025-12-29 Size : 12kb User : 张承云
[Audio program] Linear-Predictive-Coder-master DL : 0: Linear-Predictive-Coder MATLAB Implementation of LPC algorithm for speech signal # Why LPC? In communication systems it is often necessary to transmit audio(speech) signal in compressed or encoded form because of bandwidth limitation of the channel. In this regard, ‘Linear predictive coding(LPC)’ is an effctive method of speech coding at a low bit-rate. # Features ** Analysis/Encoding phase,Synthesis/Decoding phase. **Human voice modelled with all-pole filter. ** LPC parameters(filter coefficients, pitch, gain etc) extraction at the decoding phase. ** Non-overlapping frames of 30 milliseconds in duration # How To Run ** Make sure MATLAB(latest version) is installed ** Put both files(LPC.m with .mp3 file) in the same folder ** Open LPC.m file and run it. ## Comments Different audio (.mp3) files can be coded/decoded by changing the input file name in the code.
Date : 2025-12-29 Size : 2kb User : japaoli