Harmonize 2 audio sounds

Steve did produce a plugin which could be used to match the frequency-response of one track to that of another in Audacity , but using it is not a simple matter * , particularly if you are a “novice”, [ trial and error with the equalizer may be easier ].

Tip: If you are going to use Steve’s “SpectrumToEqCurve.ny” plugin don’t choose more than 1024 points : it may crash Audacity. ( An equalization-curve with 1024 points may take a few minutes to calculate ).

[ * if you want track X to sound like track Y …
Step#1 obtain a equalization-curve for track X using Steve’s “SpectrumToEqCurve.ny” plugin,
invert that equalization-curve in the equalizer, then apply that inverted equalization-curve to track X so it then has a flat frequency-response.
Step#2 obtain a equalization curve for track Y , and apply it to the flattened version of track X ].