Pipe Dream. Resonance Labs presents a windless pipe organ based on controlled feedback. Its 16 tuned, MIDI-controlled PVC pipes provide a rafter rattling bass line for an orchestra composed of Tesla coils by the Geek Group. Each pipe has a speaker and microphone pickup with a control circuit that feeds the microphone signal to a 30-watt amplifier and a speaker for each pipe & here’s the M4V file.