Changing Treble Tone Of A Recording

I have a choir recording which was produced on a poor recorder resulting in a very harsh treble tone. Is it possible to reduce the treble sound using Audacity? I can see Effect/Manage then Tone in the resulting menu but I cannot make it work.

You can adjust the tone using the Equalization effect:

To make the tone less harsh without sounding dull, you need to reduce the frequency band that is causing the harshness.
Probably easiest to use the “Graphic EQ” view and use the Preview button to test the effect before applying. The harshness probably comes from frequencies around 2000 Hz, so try lowering the sliders around that range.

Many thanks for that Steve. I’ll study what you say and see if I can improve things.