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

实现裸音数据的FFT变换以及对音频样本序列的处理，包括实现Forward和Reverse Fourier变换-Bare implementation of the FFT transform audio data as well as audio samples of the treatment sequence, including the realization of Forward and Reverse Fourier Transform

基于音频库Bass 的可以实时倒序播放音乐的源代码。支持各种主流文件格式。-Play music Bass audio library source code can be based on real-time reverse order. It supports all major file formats.