Can you teach an old guitar new tricks? The jury's out on that. But an old guitar can teach you, just like when Dave Davidson ...

Any old knobs wouldn’t do for this project. [Bradley] knurled and turned his own aluminum knobs and they look awesome! The units power is turned on when the guitar cord is plugged in.

The workshop at Electronic Audio Experiments. (Lukas Harnisch for WBUR) The guitar in John Snyder’s lap is wired through a nondescript aluminum box covered in an array of knobs and switches.