音视频优化

https://www.cnblogs.com/kevingod/p/4904133.html  很多音视频处理教程

https://blog.csdn.net/nothingl3/article/details/42265483?locationNum=6&fps=1 音频处理错误信息说明

https://blog.csdn.net/sbadhwm/article/details/40661059

http://www.it1352.com/541300.html

https://blog.csdn.net/kmyhy/article/details/53519809   混音AudioKit

https://blog.csdn.net/sinat_23907467/article/details/72358410 苹果官网上的demo列表

https://blog.csdn.net/shengqiangliu/article/details/51057321    音频-AudioComponentDescription 类型设置

https://blog.csdn.net/hunterhuang2013/article/details/64443718 EQ设置的说明

http://msching.github.io/blog/archives/       很多音视频的知识

https://blog.csdn.net/qq_33685534/article/details/72831506?locationNum=8&fps=1   音视频学习的博客

https://blog.csdn.net/linfei2707/article/details/45369135 soundtouch算法提取

http://www.it1352.com/305847.html   float音频数据转成short

http://blog.51cto.com/ikinglai/1256781  获取PCM音量大小