Ondes Martenot! - William Weir | It's Alive!

The Guardian has a good primer on the ondes martenot. Patented the same year as the theremin, it operates on similar principles, but the combination of a keyboard and a ring/wire contraption gives the player more tonal control. I knew that the score for There Will be Blood used it (since it was composed by Radiohead's Jonny Greenwood, the Martenot's most vocal champion today). But I did not know (til I read the Guardian article) that it's also heard on the soundtrack for Ghostbusters and Heavy Metal. Want one? Good luck. Once Olivier Messiaen stopped composing, it seemed the ondes martenot's day was done - the last one was made in 1988. But along came Greenwood who has had two replicas built at his request, and the Guardian reports that a new model of the ondes marteot is being developed.