This Voice Odder will provide you with loads of noises and surprises.
It has built in microphone - when speaking close to it one can generate crazy sounds - from echo and delay effect to reverb, extreme RESONANCE (when speaking to the mic - one can hear nothing like the voice - but very strange resonative sounds instead) sampling and distortion.
You can control the amount of feedback and the original sound source with two potentiometers.
--> You can also add an external input ! <--
Run the Voice Odder with 9V battery or 9v 600mA power supply (which is NOT included !)