I am trying the reduce the gain of a non-inverting Op-Amp circuit used as an audio pre-Amp. I have measured the output and need to reduce the audio level by about 20dB.
How do I calculate the correct resistor value change? Is it a linear relationship or do I need to convert dB gain to voltage gain and input into this equation:
How do I calculate the correct resistor value change? Is it a linear relationship or do I need to convert dB gain to voltage gain and input into this equation: