Doing this stuff yourself is a lot of fun. I used SpecLab and Coagula when I messed around with this previously, though there may be better stuff out there now:

Doing this stuff yourself is a lot of fun. I used SpecLab and Coagula when I messed around with this previously, though there may be better stuff out there now: http://www.qsl.net/dl4yhf/spectra1.html http://www.qsl.net/dl4yhf/spectra1.html https://www.abc.se/~re/Coagula/Coagula.html https://www.abc.se/~re/Coagula/Coagula.html