I am working on a microtonal sequencer made with data structures (the structures represent notes) that will read their position on the canvas as their position in time and pitch. 

I was wondering if it's possible to change the the number of pixles by which the objects move when you select them and use shift and the cursor buttons to move them.

I need this because it makes a lot more sense to divide a semitone and a 16th note into 12 equal parts as opposed to the default 10 and it would be convenient to shift+arrow move the notes around the canvas. 

Cheers,

Matija