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 plugins 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 manage VST plug-ins, use the Manage VST Plug-ins dialog box.