What is an HTK File?
An HTK file contains audio data which is used by the Hidden Markov Model (HMM) toolkit, which is a speech-recognition toolkit used to predict the occurrence of unobservable events by analyzing their observable consequences. HTK files are created by converting other audio files into the HTK format.
That said, HTK files can only be opened in the HMM toolkit. If you wish to listen to them using other programs, they must first be converted into other supported formats.
Download HTK Sample Files
Here you’ll find several .HTK sample files to download and test out.