Hack on the awesome original world-o-techno by jarkman. See http://www.jarkman.co.uk/catalog/robots/worldotechno.htm for hardware details of the original.
Listen to the result running live at techno.morph.sh!
Missing the sweet dulcet sounds of techno after CCCamp, I modded the code to walk lines of GPS coordinates. (Possibly. My Ruby is non-existent, this is mostly guesswork. Contributions, especially adding support for actual path formats like GPX, are more than welcome).
Open Sonic Pi. Copy the code in ./world-o-techno.rb. Set different waypoints, if you wanna.
Press play, walk away …