I have a very good friend that is a composer (primarily classical). His music always makes me think. His last compositions have been recorded by a company that uses “electronic music”. It sounds like a full orchestra. Completely amazing.
“.it is probably a precursor to the more current synthesizers, etc.?”
All they had were the first very, very basic first synthesis. Much more tone generators and tape manipulation,
Here is my favorite Classical electronic composition, by my favorite composer; This is the piece that scared my friends! I abdo-lutely love it!;
http://www.youtube.com/watch?v=EpBPh6OU3zE