The BH3852S and BH3852FS are signal processing ICs designed for volume and tone control in CD radio cassettes and other audio products. They can be used without a microcomputer because they use DC current for control.

Features
1) Can control volume (main volume) and tone (bass, treble).
2) Volume is produced by a low-distortion, low-noise VCA, is controlled with DC current, and, due to an internal reference voltage with temperature compensation, can control two channels with a single variable resistor.
3) Input amp can be used for gain adjustment, and matrix surround yields powerful sound.

Applications
    CD radio cassettes, micro components, car stereos, televisions