.SHN Shorten

These paragraph was take from http://www.etree.org   I highly recommend you visit it.

The etree.org community uses an independent network of file (FTP) servers that host and distribute Shorten (SHN) audio files. Shorten is our file format of choice because it uses a lossless compression scheme, and is available for a variety of operating systems. This means the digital audio files distributed via etree.org are identical to the original DAT source, and can be played on any computer. There is absolutely NO sound quality loss, or any loss of information for that matter! Every downloaded copy is an identical clone of the original DAT source.

Etree.org does not host or distribute MP3 files! While MP3 has a good sound for such a small file size, it is a lossy compression scheme. This means that when music is converted into the MP3 format, a certain amount of data is lost and cannot ever be recovered. This data loss can sometimes result as a 'swooshing' type sound in the music. For this reason, you should never make an audio CD-R from MP3 files. Etree.org has found that as CD-R's are traded, MP3-sourced discs are often mislabeled and passed along without any mention of their MP3 lineage.