Abstract: A method for maximizing the fidelity of original media files on playback systems of different capabilities comprises conducting an analysis of an original media file to obtain performance-related audio and/or video data that is encoded as metadata and synchronized with the original media file to create an enhanced media file in which the metadata is streamed in advance of the original media file. The enhanced media file in input to a playback controller which employs audio and/or video processing techniques, made possible by receipt of the metadata content prior to the original media file, to optimize the performance of a playback system in a predictive manner for greatly improved performance.

Abstract: A loudspeaker comprises a motor structure which incorporates a magnetic flux control system including a field winding, a controller connected between a voltage source and the field winding and, a polarity reversal switch preferably located across the filed winding. The magnetic flux control system is operative to produce a magnetic flux, which, depending on the level and polarity of electrical current supplied to the field winding, either reinforces or opposes the static magnetic flux produced by the magnet of the motor structure of the loudspeaker, thus altering the motor strength of the loudspeaker system.