DESCRIPTION
The audioprocessor TDA7437 is an upgrade of the TDA731X audioprocessor family.
Due to a highly linear signal processing, using CMOS-switching techniques instead of standard bipolar multipliers, very low distortion and very low noise are obtained. Several new features like softmute, and zero-crossing mute are implemented.

■ INPUT MULTIPLEXER
    - FOUR STEREO, ONE MONO INPUT, AND ONE DIFFERENTIAL INPUT
    - SELECTABLE INPUT GAIN FOR OPTIMAL ADAPTATION TO DIFFERENT SOURCES
■ FULLY PROGRAMMABLE LOUDNESS FUNCTION
■ VOLUME CONTROL IN 1dB STEPS INCLUDING GAIN UP TO 16dB
■ ZERO CROSSING MUTE, SOFT MUTE AND DIRECT MUTE
■ BASS AND TREBLE CONTROL
■ FOUR SPEAKER ATTENUATORS
    - FOUR INDEPENDENT SPEAKERS CONTROL IN 1dB STEPS FOR BALANCEAND FADER FACILITIES
■ PAUSE DETECTOR PROGRAMMABLE THRESHOLD
■ ALL FUNCTIONS PROGRAMMABLE VIA SERIAL I2 CBUS