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If one creates a 1V RMS sine wave, e.g. with a peak value of 1.414 or peak-peak of 2.83, then computes psd, the resulting amplitude is around 24 dB, yet classic theory dictates the answer ought to be 20 log(1) = 0 dB. This offset seems consistent across various frequencies/sample rates/amplitudes. Can someone illuminate the amplitude scaling of the psd algorithm? Thanks. -- |
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