格式参考Multimedia Programming Interface and Data Specifications 1.0
1 aplay -C -c 1 -f U8 -r 11025 -t wav -d 7 my.wav
2 000000 52 49 46 46 9c 2d 01 00 >RIFF.-..<
3 000008 57 41 56 45 66 6d 74 20 >WAVEfmt <
4 000010 10 00 00 00 01 00 01 00 >........<
5 000018 11 2b 00 00 11 2b 00 00 >.+...+..<
6 000020 01 00 08 00 64 61 74 61 >....data<
7 000028 78 2d 01 00 80 80 80 80 >x-......<
9652 012d90 85 84 84 85 86 85 85 85 >........<
9653 012d98 84 85 85 85 85 84 84 85 >........<
9654 012da0 85 85 85 85 >....<
9655 012da4
11025*7=0x12d77 != 0x12d78
必须是偶数