Among the artists whose recordings Olof supervised were Karl Böhm, Erich Kleiber, Carl Schuricht, Sir Thomas Beecham, Lisa della Casa, Cesare Siepi, Victoria de los Ángeles, Clifford Curzon, Wilhelm Backhaus and Yehudi Menuhin.
He recommended to the head of Decca, Edward Lewis, that Olof should be invited to join the company to produce some of the many recordings planned for the expansion of its classical catalogue.
[7] Olof's first sessions as producer were with Decca's renowned engineer Kenneth Wilkinson, recording Eileen Joyce with Beer and his orchestra in music by Grieg, Debussy and Delius in June 1944.
[8] In between supervising sessions of music by composers from Eric Coates to Wagner, Olof conducted some recordings for Decca, mainly of overtures and other short orchestral pieces.
[8] At the end of the war, Lewis authorised the expansion of Decca's classical programme to make it international, with recordings in Paris, Amsterdam, Zurich, Geneva, Bayreuth and Vienna.
[8] Among those whose recordings Olof supervised for Decca were Josef Krips, Karl Böhm, Erich Kleiber, Carl Schuricht, Lisa della Casa, Cesare Siepi, Wilhelm Backhaus and Clifford Curzon.
[10] Having had substantial influence over the choice of repertoire at Decca, Olof was more constrained at EMI, where he was subordinate to the head of the company's International Artistes Department, David Bicknell.