Portnoff, Concertino in E min Op. 13 for Violin (Bosworth)

Jakob Dont, a Viennese violin pedagogue, wrote the 24 "Études et Caprices", Op. 35, which are violin solos without accompaniment and are considered essential classics. Published in 1880, the pieces consist of 48 pages and are edited by H. Berkley at a very advanced level. The etudes have been reworked by violinists such as Carl Flesch, Max Rostal, and Ivan Galamian in numerous new editions throughout the twentieth century.

Hoffmeister's "Duo in B-flat Major, Op. 13, No. 4" is a popular classical composition for violin and viola. The piece has three movements: Allegro Moderato, Adagio, and Rondo Allegretto. Hoffmeister was a German composer and music publisher known for his extensive work on the flute. He created over 25 concertos and chamber works for the flute, considering Vienna's growing number of amateur musicians. He also composed eight operas, over 50 symphonies, several concertos, a vast amount of string chamber music, piano music, and collections of songs.