Hindemith Viola Sonata, solo score. - Title: Hindemith Sonate für Bratsche allein (Solo Viola) Op. 31/4 - Publisher: Edition Schott - Product Number: ED 8278 - Language: German - Instrument: Viola Thank you for looking! This is the score for Hindemith's Viola Sonata Op. 31/4. I mistakenly purchased it four years ago and have never used it. There are no markings. I kept it intending to practice, but as I am not a viola player, it is too difficult for me, and I would like someone to play it.