Piano Trio,String Ensemble Cello,Piano,Violin - Level 3 - Digital Download SKU: A0.532568 Composed by C.M. Von Weber. Arranged by Klas Krantz. Classical,Romantic Period. Score and parts. 5 pages. Amadeus Music #6472141. Published by Amadeus Music (A0.532568). Carl Maria von Weber (1786 –1826) was a German composer, conductor, pianist, guitarist and critic, one of the first significant composers of the Romantic school.