"...When I saw the skimmer demonstrated to me (thanks N6TV), I could see that he had a file on his laptop that contained a whole band of a contest (works for both SSB and CW for this)..." and "..You
N6TV demonstrated several programs. I am not sure what program was used to record the audio data (I suspect it might have been WinRad). Bob (or WA6KBL) had prerecorded a large (about 500 MB) .wav fil
Skimmer can record the I and Q signals from the SDR to a file, and play them back later. However, there is other software that can do the same thing, include the Rocky freeware (also written by VE3NE