VoxForge
Create an HTK codetrain.scp script in your 'voxforge/auto' folder containing the following information:
This is an HTK a file
containing a list of each audio file you created in Step 3 and
the name and location of the MFCC
file (special HTK audio format) it will be converted to. See Step 5
of the Tutorial (Linux, Windows) for further details.