Adagio from BWV 1020 in g-minor, arranged for Transverse Flute, Violin and Viola or 2 Violinen and Viola
from the flute sonata in g minor https://music-learning.net/work-info/72/Bach%20J.s./adagio-from-bwv-1020-in-g-minor-arranged-for-transverse-flute-violin-and-viola-or-2-violinen-and-viola