A system and method for performing functional decomposition of a software design to generate a computer-executable FSM and a graphical representation of the design in a decomposition diagram stored in a program database with source code, test code, and other program data. The frame of the speaker driver is configured to be mounted to a structure’s surface such that the pole piece of the driver is located within the structure’s interior space. The device may be used in digital or analog circuits. The encryption unit may filter, convert or reject predetermined commands or types of information in the header to prevent covert channel transmissions.