I am trying to build my own music instrument pickup and I need some help! I first am looking at piezo sensors but had some questions... Do I have to make sure that the piezo sensor picks up the entire frequency range of my instrument? I can't seem to find any sensor that has a large enough range.. do you guys have any suggestions on what to buy...? I want it to be great quality so I don't just want to slap on a ceramic disk piezo and be done... Thanks!