Shorten (SHN) is a file format optimized for compressing audio data.
It is a form of data compression of files and is used to losslessly compress CD-quality audio files (44.1 kHz 16-bit stereo PCM).
Shorten is no longer developed and more mature lossless audio codecs such as FLAC, MPEG-4 ALS, Monkey's Audio (APE), TTA, and WavPack (WV) have become more popular.
However, Shorten remains a common format due to the large number of legally-traded concert recordings in circulation that are encoded as Shorten files.
Being lossless, these files can be transcoded with the newer and more effective codecs without any loss. Shorten files use the .SHN file extension.