The circuit has the 40k resistor to prevent a high input signal from destroying the opamp. The input bias current of the opamp that flows in the 40k resistor is so low that the voltage across it is nearly nothing.
What is this circuit driving? A speaker?
It is supposed to drive a power amplifier. The power amplifier drives a speaker.
What is this circuit driving? A speaker?
It is supposed to drive a power amplifier. The power amplifier drives a speaker.