View tda7317 datasheet:

TDA7317 ® FIVE BANDS DIGITAL CONTROLLED GRAPHIC EQUALIZER VOLUME CONTROL IN 0.375dB STEP FIVE BANDS STEREO GRAPHIC EQUAL- IZER CENTER FREQUENCY, BANDWIDTH, MAX BOOST/CUT DEFINED BY EXTERNAL COM- PONENTS ±14dB CUT/BOOST CONTROL IN 2dB/STEP ALL FUNCTIONS PROGRAMMABLE VIA SE- RIAL BUS SDIP30 VERY LOW DISTORTION VERY LOW NOISE AND DC STEPPING BY ORDERING NUMBER: TDA7317 USE OF A MIXED BIPOLAR/CMOS TECH- NOLOGY tenuated up to -17.625dB in 0.375dB step. DESCRIPTION All the functions can be programmed via serial The TDA7317 is a monolithic, digitally controlled bus making easy to build a µP controlled system. graphic equalizer realized in BiCMOS mixed technol- Signal path is designed for very low noise and distor- ogy. The stereo signal, before any filtering, can be at- tio