audacity spectrogram - SERP Analysis

https://manual.audacityteam.org/man/spectrogram_view.html

https://www.youtube.com/watch?v=EvZ7kr9xqeE

https://support.audacityteam.org/audio-analysis/spectral-analysis

https://manual.audacityteam.org/man/spectrogram_settings.html

https://www.youtube.com/watch?v=q7MotHfrWEE

https://manual.audacityteam.org/man/spectral_selection.html

https://www.youtube.com/watch?v=Eyqgu4N9rho

https://www.reddit.com/r/audacity/comments/pd25dv/question_about_spectrogram_settings/

https://forum.audacityteam.org/t/improve-display-of-frequencies-in-spectrogram-window/63890

https://music.tutsplus.com/how-to-use-audacitys-audio-spectral-analysis-tools--cms-108664a