Most of Rosbaud's Mahler is available on the Japanese Memories label, in a 2-volume set, and though the quality is variable, the upcoming SWR set should be excellent. Rosbaud's M9 in particular, is excellent and the playing is consummate. SWR's previous releases are dedicated primarily to concentrating on a given composer with each set having excellent sound. Of particular interest is Rosbaud's Bruckner set, which has all the symphonies except for "0" and No. 1. Their most recent release is one of Beethoven, though it doesn't have all of the symphonies.
In the summer, Rosbaud participated in opera performances at the Festival of Aix-en-Chapelle (I think I got the name correct). A Mozart Don Giovanni and Figaro from that festival are part of my collection.
It's sad that Rosbaud didn't get to live any longer than he did. I'm sure that if he had, he would eventually have attained worldwide fame that he so much deserved. Shortly before he died, as mentioned by Barry, Rosbaud conducted a M9 with the Chicago Symphony, that earned him a "Tusch" from the orchestra. Reiner, the then CSO music director wanted Rosbaud to succeed him as music director, but with Rosbaud's passing, Reiner then wanted Karl Böhm to succeed him. And as we know, that didn't happen, with Jean Martinon becoming Reiner's replacement.
Thanks for bringing this to our attention, Barry. I'm looking forward to getting Rosbaud's Mahler set.
Wade