The Symphony is the first major work (also in respect of its instrumentation) that Webern wrote using the technique of twelve-note composition. Admittedly it is scarcely any bigger than the "String Trio" which immediately preceded it, and the instrumentation is deceptive as far as volume is concerned, since the texture at no point exceeds the classical norm of four-part writing. Cum grano salis, one could describe the Symphony as a quartet for nine instruments. What distinguishes it from Webern'...