I can select a spectrum in Spectral Analysis mode, but I can't copy it or play just the selected spectrum

Hey I’m tuning my headphones and they have really sharp highs I want to be able to play the selected audio spectrum in spectogram view.
There was in the past an effect that would let you cut out anything that wasn’t selected by the spectrum analyzer.
Okay I finally found the effect “removing spectrum” it was under ”removing ghost”.
But could you guys make this workflow better?