View tda7406t datasheet:

TDA7406T CAR RADIO SIGNAL PROCESSOR Audio processor: 4 STEREO INPUTS 4 MONO INPUTS VOLUME CONTROL 7 BAND EQUALIZER FILTER CONTROL TQFP44 HIGH PASS FILTER FOR SUBWOOFER ORDERING NUMBER: TDA7406T APPLICATION DIRECT MUTE AND SOFT MUTE QUALITY DETECTOR OUTPUT INTERNAL BEEP GENERATION 4 INDEPENDENT SPEAKER OUTPUTS SOFT STEP SPEAKER CONTROL Digital control: SUBWOOFER OUTPUT I2C-BUS INTERFACE 7 BAND SPECTRUM ANALYZER FULL MIXING CAPABILITY DESCRIPTION PAUSE DETECTOR The device includes a high performance audio pro- cessor with 7 bands equalizer and spectrum analyzer Stereo decoder: plus a stereo decoder-noiseblanker. The whole low RDS MUTE frequency signal processing necessary for state-of- NO EXTERNAL ADJUSTMENTS the-art as well as future car radi