http://www.voxforge.org/home/dev/acousticmodels/linux/create/htkjulius/tutorial/download
mkdir data/{train/{lab,wav,mfcc},test/{lab,wav,mfcc}} -p
mkdir analysis training model def test
ppeix:test$ tree
.
├── analysis
├── data
│ ├── test
│ │ ├── lab
│ │ ├── mfcc
│ │ └── wav
│ └── train
│ ├── lab
│ ├── mfcc
│ └── wav
├── def
├── model
├── test
└── training
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