Most of Darr's works were not published in his lifetime, which makes dating his music almost impossible. Many manuscripts and most of the printed music is preserved at the Bavarian State Library (Fritz Walter and Gabriele Wiedemann Collection).
Most of Darr's works were not published during his lifetime, making it nearly impossible to date his music. Numerous manuscripts and most of the printed music are preserved at the Bavarian State Library (Fritz Walter and Gabriele Wiedemann Collection).