Franz Schubert's Mass in G major (D 167) was composed in 1815 for his home parish in Vienna-Lichtenthal. It was initially intended as a Missa brevis with string orchestra and organ, but was soon supplemented by two trumpets and timpani ad libitum for more festive occasions. This instrumentation is documented in a set of parts that Schubert himself wrote shortly after his full score was completed. Numerous other copies of parts from Schubert's circle prove that the composer continued to experimen...