Convert nist to sd2

What is the difference between .nist and .sd2?

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.; The Sound Designer II file, with the extension .sd2, is an audio file format that was originally developed by Digidesign for their digital audio workstation software, specifically for use in professional recording and editing environments. The format was widely used for its high-quality audio data storage and was particularly popular in the late 80s and 90s. It supports multiple audio channels and bit depths, making it versatile for various audio production tasks.