Question: When was the electronic musical instrument controlled without physical contact by the thereminist, developed?
Sentence (from "Timeline of music technology"): The timeline of music technology provides the major dates in the history of electric music technologies inventions from the 1800s to the early 1900s and electronic and digital music technologies from 1917 (the date of the Theremin's development) and electric music technologies to the 2010s.
Relevant evidence: Yes