Sorry about the odd interface. WIDesigner uses a lot of parameters for it's calculations, and they maybe aren't organized as well as they could be.
At present, WIDesigner doesn't try to isolate a tuning slide. For now, it's best to set the tuning slide to an intermediate position when taking all the tuning and geometry measurements. We might try to add a tuning slide parameter, if we can do it without making the interface even more challenging.
If you work up a model of a flute and an A440 tuning file, and WIDesigner predicts most of the notes will be around 20 cents flat, then you probably have an A435 flute in front of you. The net error at the bottom of the Deviation column in
the tuning table gives a rough indication in this case.
tstermitz wrote:Is it possible to use measurements from a (high-resolution) photograph to determine the flute tuning? Maybe you have to make some assumptions about things you can't observe, like bore profile. ... Which parameters are more sensitive to mis-measurement, vs which ones are relatively insensitive. If you have to make assumptions (because maybe you don't have the flute in your workbench), or are imprecise with certain measurements, then which ones can you let slide a little.
Good questions, and closely related. There are some parameters that are impossible to measure precisely, so you have to make your best guess. If you try it first on flutes for which you
can measure geometry and tuning, you should get a sense of where best to set things like the blowing level, airstream length, airstream height, and beta factor. I'd suggest you start with blowing level 9, airstream height 1 to 2 mm, beta factor 0.4, and an airstream length a bit smaller than the width of the embouchure hole. I'm not sure there are any parameters that are absolutely crucial to measure precisely.