http://www.w3.org/ns/prov#value | - BACKGROUND OF THE INVENTIONThis invention relates to an output control device for use in producing an output signal in response to an input signal, such as an audio signal or a video signal.In general, it often happens that an input signal, such as an audio or a video signal, is subjected to fade-in or fade-out operation and is produced as an output signal which gradually increases or decreases a
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