Uli,I did read what you said just after you posted it but I confess that I don't understand everything you said about harmonics.
I understand what you are saying about trying to get different tones from one string, though.
When I heard the harp, on a few occasions, singing in the wind, it wasn't a very strong wind, so I haven't heard it when the wind is at full blast, and I probably never will because I wouldn't want to have my harp out in a wind that strong anyway.
So, you have given me some things to think about.
I do have Wave Studio so I'll have a play around with it and see what I can do.
Helen