You'd perhaps imagine that just about everything Rudolf Serkin's recorded has been unearthed and released by now, but that's not the case. Mark Obert-Thorn has restored two previously unpublished recordings from early in his career, including a full performance of the Schumann Piano Concerto with the London Philharmonic Orchestra under composer Julius Harrison from 1936.
Also out for the first time is a recording with the great Adolf Busch. Together they tackle Busoni's second Violin Sonata in a US broadcast from 1940. As Tully Potter explains in his notes, the pair were hugely informed and influenced in their interpretation by meetings with the composer and bearing witness to his own performance of the work.
Finally there's Serkin's justifiably famous 1936 studio recording of Beethoven's Appassionata Sonata. For a recording which stayed in print for decades you may be surprised to learn that it had fallen out of circulation. Furthermore, all previous CD reissues of it derived from a flawed transfer that omitted a chord - so this is actually the first time the whole recording has appeared in a digital format!