I just released a new version of mySdrPlayback, version 1.1.0 now supports SDR# and SDRuno IQ files, in addition to previously supported Perseus, SdrDx and SpectraVue.
Why use this app? It makes it easy to slog through lots of recording files, looking for intresting signals. Load a file, and a waterfall for the entire file is created. You can scroll around, and if you see anything that looks interesting, you can drag select it, and then demodulate it. You can even save the demodulated audio as a WAVE file, that you can listen to later, send to someone else, or play into your digital decoding software, if it is an RTTY, SSTV, etc. transmission.
This is the app I use to slog through an entire night's worth of recordings of the 43 meter band, looking for pirates and other bumps in the night. I can efficiently go through 12 hours of SDR recordings in 10 or 15 minutes (add some more time to actually listen to stuff of course).
mySdrPlayback is free, and only available for macOS:http://www.blackcatsystems.com/software/sdr_iq_recording_playback_program.html
mySdrPlayback is offered without any warranty at all. Use at your own risk. Guaranteed to blow up your computer, zap your radios, and destroy pirate radio. Keep away from Al Fansome at all costs.