My favorite performances of the various Kammermusik are on old lps, often very modernist and edgy. An old one with Peter Rybar as soloist comes to mind, for instance. I got this set a while ago but it is very different. There is a vigor to the readings and yet everything is played sub specie aeternitatis. Almost like a fascinating modernist filigree in the heavens. The effect is odd, but enjoyable, as if the performers -- or more likely, conductor -- had the opening filigree of Mathis der Maler in mind as a guide. Again, odd but enjoyable.