Thanks to all of you guys. Deep end I think hit the nail on the head. I do have a GD30CE with atp 4 td pick up. I am just a hummer and a strummer, and have been playing since the 1970,s I have not had this Tak for to long ; trying to learn a little bit about the tuner and what it takes to plug it in. I changed the two wire plug ins on the piezo and the tuner works fine but do not have an amplifier to try it. Thanks for the advice.