Multi-functional audio and video control box
Mute apparatus and mute method
Muting circuit for computer having dual audio boards
Power supply noise immunity for audio amplifier
Sequential audio switcher
Speaker system of utilizing pulse width modulation signals...
Stero speaker mixer
Switching circuit built in IC for earphone and loudspeaker...
System and method for multiplexing control signals over data sig
System and method for sensing a sound system
Techniques for audio transducer switching under programmatic...
Video/audio output device and external speaker control...
Video/audio output device and external speaker control...