The upcoming Ardour v9.3 release is going to feature easy chord insertion in pianoroll windows. You can help us improve this feature by naming & adding chords. Please see here for the background information:
https://discourse.ardour.org/t/help-ardour-by-naming-adding-chords/113178

Help Ardour by naming & adding chords
The upcoming 9.3 release will feature some new functionality for chord editing. As a part of that, Ardour now contains some chord definitions. Chord naming is a famously problematic area of musical practice, with many different approaches and conventions. So, below is a list of the chords that we currently defined, presented like this: {… list of intervals (using western-centric terms … } (“name1”), (“name 2”) … (any chord can have an unlimited number of names. The first one is consided the ca...
