Convert nist to ogg

What is the difference between .nist and .ogg?

Description: SPHERE (SPeech HEader Resources) is a file format defined by NIST (National Institute of Standards and Technology) and is used with speech audio. SoX can read these files when they contain μ-law and PCM data. It will ignore any header information that says the data is compressed using shorten compression and will treat the data as either μ-law or PCM. This will allow SoX and the command line shorten program to be run together using pipes to encompasses the data and then pass the result to SoX for processing.; An OGG file is a compressed audio file that uses free, unpatented Ogg Vorbis audio compression. It is similar to an .MP3 file, but sounds better than an MP3 file of equal size, and may include song metadata, such as artist information and track data. OGG files are supported by many software music players and some portable music players.