Lyle, > Others may disagree, but I find that spectrogram programs are a poor > substitute for the human ear when trying to copy CW at speeds of 5 WPM or > faster. My only exception to that has been in trying to copy TH under marginal conditions. I find that looking at CoolEdit's spectral display can beat my ear/brain combination by enough to copy the signal. It's close, though. John A.