Our new book uses these calculators to design preamps, power amps, and power supplies. An entire chapter is devoted to sculpting the dynamics of overdrive and harmonic distortion.
There is a familiar formula for the voltage gain of a voltage divider formed by two resistors: A = R2 / (R1 + R2). Not so familiar are the formulas for determining the value of R1 or R2 when a specific amount of attenuation is desired. Here is a calculator that determines the unknown resistor value.
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