Par BARTOK BELA. Like so many famous virtuosic works, Bartók’s Sonata for Solo Violin was said, by its commissioner, Yehudi Menuhin, at first sight, to be unplayable! Of course, Menuhin soon changed his opinion, later describing the work as the most important composition for solo violin since Bach. The original work used the full array of violin techniques such as stopped harmonics, left-hand pizz…