How to Modify a voice transformer into a music effects pedal
A "voice changer" can be rewired so that you can play a pre-amped instrument through it like an effects pedal. It makes some relatively freakish sounds and is much more interesting this way. You can still use a microphone to talk through it but now you can rock out through it as well. Watch this video circuitry tutorial and learn how to modify a voice transformer into an effects pedal for musical instruments.