Recommendations Audio Spectrum Analysis Software?

Am looking for audio spectrum analysis software recommendations (either audacity plugin or standalone).

Found Raven Lite and Pro http://www.birds.cornell.edu/brp/raven/RavenFeatures.html and checked forum but found nothing relevant.

Thanks

Ken

How about the Audacity Spectrogram track view and Plot Spectrum?

You’ll have to increase the Audacity-spectrogram window-size from the default setting to match the high-resolution of “Raven Viewer”, ( settings are in Audacity preferences , spectrograms) …
spectrogram window size ''most narrowband''.gif
[ the increased window size will put extra strain on your computer’s CPU : things may get a bit sluggish ]

audio spectrum analysis software

Real time? Audacity doesn’t do any effects or tools in real time. Koz

If it brief is “real-time spectrogram” there are free options … https://forum.audacityteam.org/t/filtering-frequency-during-recording/24899/11