Home : File Types : NIST File

.NIST File Extension

File TypeNIST SPHERE Audio File

2.0 (1 Vote)
CategoryAudio Files

What is a NIST file?

A NIST file is a waveform audio file saved in the National Institute of Standards and Technology's Speech Header Resources (SPHERE) format, which is used in speech recognition research. It contains a recording of a person speaking. NIST files are used as input for speech recognition systems, such as the Hidden Markov Model Toolkit (HTK).

More Information

In 1991, the National Institute of Standards and Technology (NIST) developed a standard audio format that could be used to save and distribute files meant to be used with speech recognition research software. This format was called NIST SPHERE, and files saved in this format were often saved with the .nist extension.

Notably, NIST files all include a standard ASCII header that specifies numerous pieces of metadata, including the files' database type, database version, number of audio channels, number of audio samples, and sample rate.

NOTE: NIST files are sometimes saved with the .SPH extension.

How do I open a NIST file?

Because NIST files are uncommon, most popular media players cannot play them. However, you can play NIST audio in VLC media player, and you can convert NIST files to a more usable audio format using FFmpeg or SoX.

Open over 300 file formats with File Viewer Plus.

Programs that open NIST files

Updated 9/15/2020

About NIST Files

Our goal is to help you understand what a file with a *.nist suffix is and how to open it.

The NIST SPHERE Audio file type, file format description, and Mac, Windows, and Linux programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and only publish information about file formats that we have tested and validated.

If you would like to suggest any additions or updates to this page, please let us know.