PT2312 is a four-channel digital control audio processor utilizing CMOS Technology. Volume, Bass, Balance, Front/Rear Fader Processor, Selectable Input Gain are incorporated into a single chip having the highest performance and reliability with the least external components. All functions are programmable using the I2C Bus. PT2312 is housed in 32-pin, SOP Package. 4 stereo inputs with selectable input gain, 2-band tone control (treble & bass), balance,fader and loudness function are incorporated into a single chip having the highest performance and reliability. Pin assignments and application circuits are optimized for easy PCB layout and cost saving advantages.