1METADATA block #0
2 type: 0 (STREAMINFO)
3 is last: false
4 length: XXX
5 sample_rate: 8000 Hz
6 channels: 1
7 bits-per-sample: 8
8 total samples: 80000
9 MD5 signature: a042237c5493fdb9656b94a83608d11a
10METADATA block #3
11 type: 1 (PADDING)
12 is last: true
13 length: XXX
14