https://xiph.org/flac/format.html
https://www.xiph.org/vorbis/doc/v-comment.html
http://www.cnblogs.com/caosiyang/archive/2012/07/16/2594029.html
14 1 1 4 4 4 3 1
fff8
-1,192,576,1152,2304,4608,-1,-1,256,512,1024,2048,4096,8192,16384,32768 sr ch bit 0;