In two examples Klaus Wunderlich tracks are used in early Hi-Fi stereo releases designed specifically to heighten channel separation / audio frequencies etc. By far the strangest cover is the one titled ICH, SCHMETTERLING [Trans: I. Butterfly] which shows guitarist Eva Vargas seated, holding her guitar over which a dog is urinating! According to the credits on this LP, Klaus was playing Hammond organ in an accompaniment role only. It has always been thought that he never recorded on a pipe organ, but the LP MÄNNER CHÖRE / MENSKES MENS CHOIR / DAS FESTIVAL DER SCHÖNEN MÄNNERSTINNEN shows on the reverse that he is credited with playing the opening track of Trӧsteren musik [ ‘consoling or comfort’ music on ] the classical organ in the Church of St Sebastian, Labberich, Germany.

The LP TANZENDE TASTEN [Dancing Buttons] is unusual inasmuch that accordionist Will Glahé is credited on the cover, yet the four tracks with accordion are those recorded by Hubert Dueringer from the Swing series, with the remaining 6 tracks shown as being performed by Will Glahé and his Orchestra.

On occasions Klaus went on tour with famous vocalist Caterina Valente and on the rare 10 JAHRE RIAS-TANZORCHESTER [Trans: 10 years RIAS Dance Orchestra] he is credited as the soloist on TICO TICO and EIN MANN MUß NICHT IMMER SCHӧN SEIN [ TRANS: A man is not always handsome ] in the company of the Werner Muller Orchestra and additionally playing Hammond accompaniment to Valente as she sings TSCHAU, TSCHAU BAMBINA. Both appear to have been taken from live broadcasts or concerts with the German RIAS Orchestra. Although there are other instances where a Hammond is heard, there is no indication that Klaus is the player. The Deutsches Symphonie-Orchester Berlin is a German orchestra based in Berlin. It was founded in 1946 by American occupation forces as the RIAS-Symphonie-Orchester (RIAS being an acronym for "Rundfunk im amerikanischen Sektor" / "Radio In the American Sector"). It was also known as the American Sector Symphony Orchestra. In 1956, the orchestra was renamed the Berlin Radio Symphony Orchestra (Radio-Symphonie-Orchester Berlin). In 1993, the orchestra took on its present name.