Avid Symphony is non-linear editing software aimed at professionals in the film and television industry.
Symphony is Avid's high end SD/HD finishing platform for long form work, such as documentary and episodic TV.
Symphony is the software component of a tightly integrated package that includes specific hardware audio/video interfaces, storage, and the computer, also sold by Avid.
Symphony Nitris DX, released in 2008, added support for a range of HD codecs, including HDV, XDCAM-HD, DVCPRO HD, and AVC-I, and brought back Mac OS support for OS X 10.5, as well as Windows Vista.
This optional package (sold at a premium) will contain all the traditional Symphony-only features to any Media Composer install.