German composer, born August 2, 1905 in Munich, deceased December 5, 1963 in Munich. Founder of the [url=http://www.discogs.com/label/247598]musica viva concert series[/url] in 1945.
https://www.hartmann-gesellschaft.de/
https://en.wikipedia.org/wiki/Karl_Amadeus_Hartmann
http://www.scena.org/columns/lebrecht/050127-NL-hartmann.html