What is a recommended software/technique combination to do spectral analysis of an electric bass guitar?

If these basses indeed have little fundamental content as theorized elsewhere, cutting a 31-band EQ below 82 Hz should have little audible effect on the produced sound. Mine don't work this way, and cutting this EQ range cuts the bottom off the sound.

I'd like to determine how much fundamental vs secondary harmonic content is present in different bass and string combinations.

The results will determine if I need response down to 41 Hz or only 82 Hz in a live performance bass cab/horn.