Well I'll be, it appears to work, the window captures the chord I play and with a ctlr/enter places it in the chord chart. I have never tried that till now.

Here is where I set up my Keyboard midi controller.

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BIAB – 2025, Reaper (current), i7-12700F Processor, 32GB DDR4-3200MHz RAM, Motu Audio Express 6x6 - My SoundCloud (Tip: No need to create a SC account to hear music - just hit ESC ).