Seashell Synth
This is a modified hex Schmitt trigger built into a seashell I brought home with me from the beach. It has 3 controllable pitches that layer and mix together to produce a complex chord. There is a diode clip mod built in to act like an arpeggiator. There is a 1/4″ jack installed, but there is a speaker mounted to the underside of the instrument so that you hold it up to your ear to listen to it like a conch shell.