A tone equalizer in darktable ?

[R_O (Roger)]

@anon41087856

All of this would hopefully make contrast/lightness/saturation, shadows/highlights, basecurve, relight, zones, and the 2 tone-mapping modules obsolete, replacing them with color-safe variants, possibly easier to control (or, at least, breaking less things), and the GUI of darktable much cleaner.

I just want to thank you for your contribution.
It is almost a year since I suggested the feature https://discuss.pixls.us/t/do-you-know-if-darktable-has-a-lightness-control-tool/7223 supported by the change of paradigm it would provide, but most people did not see it, actually, the reaction was so bad that I did not expect someone from that post to implement it, so, I am really happy that you decided to make it in such a short period of time.