Digitally Controlled Audio Processor using TDA7440

This Audio Processor designed using TDA7440 chip from ST. The chip is a volume tone (bass and treble) balance (Left/Right) processor for quality audio applications in Hi-Fi systems. A selectable input gain is provided. Control of all the functions is accomplished by serial bus I2C. The AC signal setting can be altered by resistor networks and switches combined with operational amplifiers.