In computer terminology, digital right managements (DRM) means restricting the ability to make copies of media in order to prevent privacy. A number of technologies are used for DRM, including one that uses the .sa1 file extension.
Source
The technology used to create .sa1 files was developed by Panasonic Corporation of North America.
Identification
A file with the .sa1 file extension is known as an AAC Data Wrapped file.
Function
An .sa1 file contains a song or other audio file encrypted with technology known as the SD Audio Encryption Layer. The file extension serves as a marker to your computer, signaling that the file can only be used with Panasonic brand software.
Program
The primary program associated with .sa1 files is Panasonic SD-Jukebox. This software is included with Panasonic digital-recording hardware.
Benefits
SD encryption protects files that you create with Panasonic hardware, prohibiting anyone from copying or reproducing your music or other audio files without your permission. This enables you to distribute CDs or post music on the Internet without fear of copyright infringement.
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