这个可以作为无损压缩格式的前端处理，可以降低难压缩音频文件的码率。-This can serve as a lossless compression format, front-end processing, can reduce the bit rate compressed audio files is difficult.

faac是一种非常好的音频压缩算法，可实现对不同采样率和不同码流的压缩-faac is a very good audio compression algorithm can achieve compression stream of different sampling rates and different code

ITU 的G722.1编码器，包含Annex C，是当前复杂度最低的编码器，并且压缩质量非常好，适合高并发voip使用，实测单i5cpu可以支持3000路以上的实时并行处理，采样率16000和32000 码率16000-48000，以800为梯度。-The ITU G722.1 encoder, including Annex C, is currently the least complex of the encoder, and the compression quality is very