.SBST file extension

This is the basic program to work with .SBST extension

Adobe Soundbooth CS3

Adobe Soundbooth CS3 Adobe SoundBooth Score Document

Adobe® Soundbooth™ CS3 software lets you take command of your audio in film, video, and Adobe Flash® software projects. Use on-clip controls to make fast edits and intuitive, task-based tools to clean up recordings, polish voice-overs, customize music, modify sound effects, apply high-quality filters, and much more... (more)

The program works with the following extensions: sbsc, sbst

.SBST extension is also supported by the following program:

Adobe Soundbooth CS4

Adobe Soundbooth CS4 Adobe SoundBooth Score Template