The fascinating TWO PIECES, Op. 4 for Violin and Viola, is an insight into Liebermann's imagination at 17, teeming with the musical ideas that soon expanded into full-length works. The two movements (Andante and Allegro) are rich with chromatic teasing, both stepwise and with angular leaps, and are a thrilling duet to perform — full of changing meters amid imitative entries. Score and parts are included.