The TIDIGITS database consists of men, women, boys and girls reading
    digit strings of varying lengths; these are sampled at 20 kHz.
    It's available from the LDC as catalog number LDC93S10.
  
    The subdirectory s5 consists of "s5-style" (i.e. new, at the current
    time of writing) scripts for training and testing.  Note: unlike the
    other s5 scripts we don't include word-boundary information, since it
    wouldn't add anything useful.