A bass and treble audio tone control circuit configured as an integrated circuit, wherein a capacitor for setting a frequency band can be accommodated in an integrated circuit. A LPF extracts a low sound region component SLO from an initial sound signal SIN. A low sound region adjustment circuit adjusts the gain of SLO and generates signal SLT. An inverting circuit inverts SLO and an adding circuit extracts a high sound region component SHO by adding the inverted SLO and SIN. A high sound region adjustment circuit adjusts the gain of SHO and generates a signal SHT. A synthesizing circuit synthesizes SIN with SHT and SLT, and generates an output sound signal SOUT. The LPF is composed of an RC active filter, and the resistance that establishes the cutoff frequency is composed of an equivalent resistance using a switched capacitor circuit.