This music video “Alteya” from our chamber concert at Central House of Artists with Prohor Alekseev (Theremin). This song is named in honour of Althaea – a heroine of ancient Greek mythology. She had been mentioned by Ovid, Hesiod, Homer, Aeschylus. The theremin (also known as the termenvox) is an amazing instrument named after the name of its inventor, Leon Theremin, who invented it in 1920 in Petrograd. In order to play theremin, a musician must have perfect pitch, absolute pitch recognition, because theremin is controlled without physical contact by the performer.