VST
Steinberg's Virtual Studio Technology (VST) is an interface for integrating software audio synthesizer plug-ins such as Finale's included ARIA Player for Finale with Garritan sounds. Finale supports all VST instrument (VSTi) plug-ins. VST and similar technologies use Digital Signal Processing to simulate traditional recording studio hardware with software. Thousands of plug-ins exist, both commercial and freeware.
You can assign instruments included in VST plug-ins to Finale channels using the VST Banks & Effects dialog box.
To specify the locations that Finale should search for plug-ins, use the Manage VST Plug-in Directories dialog box.