Changing a non velocity keyboard into a velocity sensitive keyboard

Hi. Is it possible to ‘upgrade’ a non velocity sensitive keyboard into a velocity sensitive one using one of your great creations?

I’m building an (cheap) electronic marimba, using an arduino due and the Digital inputs it has. The ‘keys’ are triggered with a vibration sensor. They only give an ‘on’ signal.

Would love to be able to get it ‘touch’ sensitive.
Any recommendations, tips? Thanks

Hey, if the information is missing from the input, then unfortunately it can’t really be done.