The idea

It's not a very innovative idea. Its just to make a board that makes it easy to connect your instruments. And instruments use big jacks and you want some real potmeters and foot switches. As simple as that.

I, √ėyvind Mjanger, have build effects for a decade under the brand OnkartGromt. That should give me some background to hopefully make something that can be used on a stage with professional musicians.

Program your own...

So why not start to make your own effects? You got a Teensy, so why not get a proper board to hook it up to?