本程序实现将wav音频文件转换为AMR音频文件，压缩率很高。但AMR的音质不高。-This program wav audio files to AMR audio files, high compression ratio. AMR sound quality is not high.

This solution use amr-nb voice codec to code and decode .wav files in order to sound quality on different bitrates. IDE: VS 2010 In solution four projects 1. ConvertWavToData - convert .wav file to PCM short file. 2. AMRNBCodec - amr-nb en