Improving Fmit to help tuning accordions

[labodezao]

Hi Gilles,
I am a french accordion maker and also acoustical engineer and I test your FMIT software and I think it's a verry nice base to what I would like to have.

We could have a call to discuss the differents specification about a tuner suitable for accordion tuning because it's quite tought subject but mainly, I would lile to be able to graph the error also tho the different harmonics frequencies, because, a good tuning is not only over the fundamental frequency and have to deal also with harmonicity.

Accordions sounds could be both very harmonic or not, and as a man skilled from the art, I have to take care of the harmonicity of accordions.
And also, accordion could have several notes slightly detuned from one to oneother.
For that, I'am sure that for little modification of the code, Fmit could be a wonderfull tool.

I am not a verry good coder but I am ok to try to help you on those aspect if necessary.
Thanks by advance for you helps,
Ewen from Saint-Nazaire (fr)