Sarah had formed an important collection of Bach family manuscripts which she bequeathed to the Singakademie; Zelter, whose tastes in music were conservative, was also an admirer of the Bach tradition.
Sarah formara unha importante colección de manuscritos da familia Bach que legou á Singakademie; Zelter, cuxos gustos musicais eran conservadores, tamén era admirador da música de Johann Sebastian Bach.