METADATA block #0
type: 0 (STREAMINFO)
is last: false
length: XXX
sample_rate: 8000 Hz
channels: 1
bits-per-sample: 8
total samples: 80000
MD5 signature: a042237c5493fdb9656b94a83608d11a
METADATA block #1
type: 1 (PADDING)
is last: true