This demo video shows an Electric Western Zia Ribbon Controller controlling a Phantastron vacuum tube synthesizer.

via sheepslinky:

Demonstrating the new Zia Ribbon Controller and the Phantastron from Electric Western.

This setup is played much like a Trautonium. A ribbon controls the pitch and volume is controlled with a foot pedal.

Technical Setup:The ribbon CV is fed into a Solid State 1V/oct oscillator which is fed to the sync input of the Phantastron. Audio is taken from the Phantastron only and delay is added. Volume is controlled by a Roland expression pedal that plugs into the Zia Ribbon’s circuits (which are on the desk behind me) and controls a VCA. The ribbon shown is a prototype, and the nice wooden case has not been built yet…