An artist's muse is sometimes a very unreliable lady. Because when Stefan Schwalgin was writing the slow introduction to a cozy Bohemian polka, it happened: He involuntarily found himself in a fast-paced big band swing in his piece, which then just wouldn't stop for almost three minutes. The actual polka was then extremely short, as the allotted time had been exhausted. What was left was above all a grandiose "introduction" that is probably unparalleled...

With the humorous "Introduction to a...