Audio user interface

Audio user interface with selective audio field expansion

Audio-band electro-mechanical vibration converter

Auto voice changing apparatus

Automated stereo synthesizer for audiovisual programs

Automatic dimension control for a directional enhancement system

Automatic frequency control circuit in a stereo FM radio receive

Automatic frequency control for local oscillator used with an AM

Automatic IF tangent lock control circuit

Automatic LFE audio signal derivation system

Automatic mode detection in digital audio receivers

Automatic multi-system AM stereo receiver using existing single-

Automatic stereophonic manipulation system and apparatus for ima

Automatic stereophonic manipulation system and apparatus for ima

Automatic telephone switch for hearing aid

Automobile audiovisual system

Automotive audio reproducing apparatus

Automotive surround sound circuit background of the invention

Balance control circuit

Bass management system for home theater equipment