A pseudo bass generating apparatus includes a first 4th-order LPF, an absolute value circuit, a clip circuit, a multiplier, a first adder for subtracting an output signal of the multiplier from an output signal of the clip circuit, a second adder for adding an output signal of the first adder and an output signal of the absolute value circuit, a second 4th-order LPF, and a third adder for adding the input signal and an output signal of the second 4th-order LPF.