Mark of the Unicorn (MOTU) Symphonic Instrument Soft Synth (Macintosh and Windows)
Software Synthesizers and Samplers for Computer Music work

Mark of the Unicorn (MOTU) Symphonic Instrument Soft Synth (Macintosh and Windows)
The MOTU Symphonic Instrument is a cross-platform instrument plug-in that gives users quick and easy access to an enormous 8GB library of quality orchestra sounds for composing, sequencing and rendering realistic orchestral performances. The MOTU Symphonic Instrument can be used with any compatible host application (VST, Audio Units, DXi, MAS and RTAS), where users can load up to sixteen different instruments per instance of the plug-in to create ensembles of any size and scope.
Software Synthesizers and Samplers
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If that's not enough then check out the following link for the full specifications - Symphonic Instrument Soft Synth