from the CMU sphinx website:

The aligner takes audio file and corresponding text and dumps timestamps for every word in the audio. This functionality is useful for processing of the transcribed files like podcasts with further applications like better support for audio editing or for automatic subtitle syncronization. Another important application is acoustic model training, with a new feature you can easily collect databases of thousand hours for your native language with the data from the Internet like news broadcasts, podcasts and audio books.

--- (Edited on 8/23/2014 2:49 pm [GMT-0400] by kmaclean) ---