If you use “Plot Spectrum” you will see that the frequency content is different. You may be able to make them more similar using the “Graphic EQ” effect.
OH , You mean I do something like the picture you showed me . OK but when I try I do not get those curved lines all lines I create are straight now like thick pencils as you showed me . I do not have Equalization in my audacity
It would be possible to make them a better timbre match with a higher resolution equalization,
but no amount of equalization will turn a basic violin into a Stradivarius.
It is not like Violin into stradivarious , Both are same harmonica , same music note , same mic same distance
the only difference is that the second one the harmonica is in my hand the other one I am playing it without hand around it
because I use rack to play it with my guitar I can hold it inside my hand to give that round sound
I just noticed the latest version of Audacity only allows 200 control points on an EQ curve Harp-128p.xml (2.25 KB)
The necessary +6dB bump at ~400Hz does not survive the approximation to 128 points