Gboard usb
check this out:
http://www.gboard.com/
i think that would be pretty handy, using some software to convert it’s signals to midi. you could turn it sideways and have two different sets of buttons that are already different colors. plus some extra in the middle for whatever.
Unfortunately it sends Gmail keyboard shortcuts such as so by using this you’d be duplicating buttons on your keyboard which are laid out differently to the gboard.
Considering getting one of these. It’s currently on tanga for 5 bucks. (+5 shipping). Same as mapping a keyboard. However may prove to be a little more user friendly with the colored keys and also curious how responsive the keys are. Anyone think it’s even worth investigating?
You can get numbered keypads at just about any office supply store.