It’s interesting to see her how the focus is primarily on the creation of instruments on which one could perform western tempered music (as opposed to music concrete or noise-music). Although those more avant garde approaches to electronic music would come soon, this earlier approach – the electronic (as opposed to bellows) organ, the violin-simulating theremin – seems to be what has won out. Eighty years later, most of us are not usually listening to atonal clusters of carefully organized noise – we’re still mostly listened to very diatonic, 4/4 folk-songs (essentially) performed and presented via wholly electronic means.
Above: an electronic Carillion as built by RCA. The principle employed here is also still very popular today.