I don't quite understand. Can you be more specific?

Do you mean lift the min/max frequency constraints for the bands? or automatically detect "problems"?

To have the ability to solo a band applying a band pass filter to listen to that specific frequency. This would make it clear http://www.fabfilter.com/help/pro-q/using/solo

got it. nice idea.

prototype underway.
Currently middle-click (button 2) on a node in the display will solo the band and allow dragging it.

This will solo an individual band, but not mask the rest of the spectrum. I'm not too happy with middle-click + drag and it being only available from the graph (not the button area);
but well, gotta start somewhere.

Awesome Robin! I'm compiling right now!

Ok tried it out. It's coming along nicely, the rest is applying a bandpass filter to the soloed eq band. I'm not bugged at all if there is no visual feedback in the button area, but maybe is a good idea to have something in the spectrum display that indicates that a band is soloed. Thanks for your efforts Robin!

This might be useful as well https://www.youtube.com/watch?v=j4VTVBEsRiA

Adding an additional bandpass to notch out the rest of the spectrum is - alas - at odds with the fundamental design of each of the bands.
I'm not yet sure what do do about this adding Hi/Lo pass at the edges would be a hack. I'll have to sleep over this.

well now. small efficient hack is to simply re-use the Hi/Lo pass filters that are already there.
that's now done in: v0.4.4-42-g2840d4c -- they're still bound to the available range and not very steep but the transition is smooth.

First of all, thank you very much for your great plugin. I am really enjoying it!!
Especially this soloing band feature is great. Unfortunately it only works 100% between 630Hz an 1kHz (where the Low- and Hi-Cut overlap) [nevertheless also in the other areas it is very helpful...]

Would it be possible, to make the "overlapping area" wider (often room ressonances are between 100-500Hz, where this feature would be great)? And perhaps would it possible to add a harder low-/hi-cut? I think, here this is asked, too...