外部リンクによると、....The Études were not, it seems, often performed during the inter-war period. One major exception was Eduard Steuermann, who,encouraged by Arnold Schönberg, performed them at his recitals.Somewhat surprisingly, the first recording of the complete Études wasmade as early as February 1938 for Decca on 78 rpm discs by Adolph Hallis, a South African student of Tobias Matthay.....とある。ルンメルは全曲初演を切望していたが果たせなかった
