Project: Create sounds with piezzo and self-made pressure sensors

Hello again, I got another question right now:

I want the arduino to read out the measured pressure (in this case the change of resistance) and "translate" it into sounds, I want to produce with a piezzo-sensor. Now I am a little bit confused, as of how to read out the signals from the pressure sensor and how to connect them to the sounds via code...

It would be nice to just get some think points, as of how to start with this code...

Thanks in advance!