Jumping Speaker
Instead of using the nail and file, you can clip the leads to two paperclips, washers, coins, aluminum pop-tabs, or loops of copper wire that you place inside the speaker cone. The cone jumps when contact is made, breaking the contact for a moment, then the metal bits fall against each other and the process starts all over—a mechanical oscillator and the beginning of what Bowers calls "The Victorian Synthesizer"
The Victorian Synthesizer
