I am working with the "Instruments for Finale 2009" application which I presume to be the Aria Player. You can access this player as a standalone application or from within Finale as a plugin.

When accesses within Finale, you can get to some fundamental performance settings by clicking the About button in the Audio Unit Viewer Window or in the main window of the standalone application. The settings that you can adjust are:

Pre Caching
International 440

Where can I obtain documentation about these settings?

What settings are appropriate if the objective is the lowest latency playback?

The standalone application also has a Buffer setting in the application's preferences window. Where can I obtain documentation for these settings?