Authenticating the source of digital media is performed by using unique, randomly generated variably encoded frequency patterns to create mastering specific, profiles for sets end user media which can be verified by a manufacturer. An aspect of the invention includes implementing non-standard IO adapters in a standardized IO architecture. An expandable locking device contacts an inner surface of the sleeve to lock the position of the sleeve with respect to the base. The tool exchange time can be shortened with simultaneously executing the movements of the spindle and the tool magazine.