! You beat me to the punch as I ran some Google searches. Yes, the Ondes Martenot
, that is the instrument. One YouTube video had an elderly gentleman well versed with the musical instrument demonstrating its features. And the number of people who can play it well are dwindling, sadly. At the conclusion, he played the Courage theme while another musician provided some brass via a French horn. If blended with a full orchestra...mercy, that would have been something!