Composer Miguel d’Oliveira shared this short video, demonstrating the rare Therevox synthesizer in his composition, Silent Rain.

Inspired by the Ondes Martenot (1928) and the Electro-Theremin (1950), the Therevox is controlled by moving a finger along a reference keyboard, giving you continuous pitch control, while you control expression with your left hand. This gives it a theremin-like quality, but trading the visual expressiveness of the theremin for more accurate pitch control.

Here’s what he has to say about it:

“Finally had a chance to write for Therevox on a feature documentary score.

This Ondes Martenot brother thing is a future classic. Beautiful craftsmanship and lovely sound.

Ended up not using the Moog pedal and replaced it with a chorus plug-in.
Played a bit of cello just to add to the grit.”