wavgain可以自动调整音频文件的增益，使得各个音频段具有同样的电平输出，在foobar上采用了这个算法。-wavgain can automatically adjust audio files gain, Audio of all makes have the same level of output in foobar used this algorithm.

Foobar2000的源代码 很有参考价值好不容易找到-Foobar2000 s source code is very hard to find reference value