One of the rather less familiar Swedish singers, Karl-Olof Johansson undertook lengthy vocal studies (1938–48),
with Joel Berglund and Carl Martin Oehman, among others. He made his debut at the
Royal Opera in Stockholm in 1948 as a baritone (Germont).
He switched to tenor in 1952 (debut as Radames) and sang in Sweden (Stockholm, Göteborg) and Denmark (Copenhagen) for a
few more years. He must have sung in both voice keys (baritone and tenor) in those years, because he made recordings between
1947 (although he was still a student then) and 1954, and all of them are in baritone key, also the latest ones. From 1956 to
1958, he had a contract at the Deutsche Oper Berlin, and stayed in Germany after then, singing in
Hamburg, Stuttgar, Frankfurt, Köln, Krefeld and Hannover. I was unable to find any information on his death.
Reference 1: Paul Harnesk (ed.): Vem är vem, 2nd edition, vol. 1 (Greater Stockholm), Stockholm 1962, p. 650;
reference 2: 78opera.com (alas defunct)
