SoundSync assumes that the default (untransformed) directional light will point down the negative Y axis. All directional lights should be either defined in Y-up space (and never zero-transformed) or should be rotated and zero-transformed so that the default direction is down the negative Y axis.
SoundSync will read the toggle status of the NumLock and CapsLock keys when you launch the application. If you change this toggle state during the session, it will create problems with the applications' hotkeys.
Because SoundSync runs in Y-up mode, you must animate Alias scenes in Y-up mode if you want to export them to SoundSync.
Because the SoundSync default is for single-sided rendering, parts of models may appear invisible if uv normals are reversed. To make everything visible, select OptionsLink Display 
As polygons (Both).