i want to compare the noise floor of different op-amps to help rule out obvious fakes. the graphs are a bit counterintuitive, like in pic related with 40dB gain the noise floor reads about -120dB but the 1.46484Hz FFT resolution affects it? a review of my sound card showed a loopback graph with unspecified FFT resolution with the noise floor reading in the graph at about -140dB but the integrated noise floor is -111dB. so i'll basically have to do trial and error to find out how much gain i need to detect the noise floor of the op-amp over the noise floor of my sound card?