AAC to NIST Converter
Convert your aac files to nist online & free
How to convert aac to nist
Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.
Choose "to nist"
Choose nist or any other format you need as a result (more than 200 formats supported)
Download your nist
Let the file convert and you can download your nist file right afterwards
Advanced Audio Coding
This format was originally created as an alternative to mp3. The idea was to achieve a small file size with better sound quality. The first versions weren’t quite successful, but with the development of AAC, it became possible to store sound with less loss of quality, and with the same file sizes as that of mp3.
NIST (National Institute of Standards and Technology)
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.