I'm a huge fan of Loopy Pro and I'm beta testing Loopy Pro v2 (612). This is just to log an interface 'tidy up' suggestion.

In the mixer, separate collapsable groups of chanels (great concept in itself) are labelled 'MIDI colors', and 'colors'. For consistency, I think this should be 'MIDI colors' and 'Audio colors'.

From the menu, a 'Color groups' window can be opened. When it opens it just has 'colors' up the top of the window and lists the MIDI colors sprinkled among the Audio color groups. I've named my MIDI colors accordingly, but it might pay to separate this list to reflect what the mixer already (almost!) does... 'MIDI colors' and 'Audio colors'.

I also don't think there is a clear distinction between creating a MIDI color and an Audio color. With the added MIDI functionality, the 'add color' button at the bottom of this color group window might need to ask a question or two before it creates an audio color by default (what I think it currently does)?