Piano Trio No. 4 in B Flat for Clarinet (Or Violin), Piano & Cello, Op. 11 - "Gassenhauer-Trio" : Beethoven: Piano Trio No. 4 in B Flat for Clarinet (Or Violin), Piano & Cello, Op. 11 - "Gassenhauer-Trio": 1. Allegro con brio