Here’s an Edison phonograph recording, freshly made at the London Dorkbot Christmas party, December 2009.

Dorkbot is a meeting for ‘people doing strange things with electricity’ so the phonograph is an odd guest as it records and playback sounds using no electricity at all. As you can see when I lift the lid (see video), this machine is entirely mechanical. You turn up a handle to wind up a spring. This unfurls over several minutes, supplying the Edison with energy. Sound recordings are made using nothing more than a heavy stylus and a horn…