The Audio File Library provides a uniform programming interface to standard digital audio file formats. This library allows the processing of audio data to and from audio files of many common formats (currently AIFF, AIFF-C, WAVE, NeXT/Sun

C语言实现的8bitA律13折线PCM编码，适合编码初学者参考借鉴。-C language of the law 8bitA 13 dogleg PCM coding, coding for beginners draw on.

求基音周期，用C语音编写，处理pcm文件，用自相关算法求基音周期。-Find the pitch period, with the C language preparation, processing pcm file, auto-correlation algorithm for pitch.