As Eckhardt van den Hoogen explains of Ernst von Dohnanyi's violin concerto is a testament to a certain time. "The result is a discreetly polystylistic music which, owing to this multilayeredness, is a piece of contemporary art very much part of the 1920s. Catch the entirety of the piece performed by Ulf Wallin, violin, and the Radio Symphony Orhcestra of Frankfurt, on Friday's program.