GUITAR HERO CONTROLLER MOD IDEA! ELECTRONICS QUESTION! ?

I am trying to work out how to do a modification to the electronic that will allow me to
bypass the need for the PICK on the controller in order to simulate piano.
Is this possible? Does anyone have experience with doing this kind of mod.
I have moderate soldering skills if necessary.

I have the image just to help imagine what I am planning to use this for.
(but obviously a much more comfortable design is in order)

Thanks in advance for any advice!



Picture of GUITAR HERO CONTROLLER MOD IDEA! ELECTRONICS QUESTION! ?
I think that the strum bar is actually a separate circuit, and that the strum requirement is in the software.

I suppose you could connect the strum bar to each of the buttons somehow to have it activated when you strum each note, but that might cause every button push to simultaneously strum and push every button.