What level signal does my mic input take on my PCs sound card?
Most PC sound cards mic inputs accept a signal of approximately 10 mV (10 millivolts). [3] Older 8-bit audio cards often required 100 mV of signal. Some sound cards do however, allow the user to double, triple or even quadriple the sensitivity of their mic input (using some software control panel). This can add significant amounts of noise.
