In 1905, she continued her studies privately with James Kwast, Carl Friedberg, Jose Vianna da Motta, and Bruno Eisner.
[4] In 1925 Weiss-Mann helped found the Vereinigung zur Pflege alter Musik (Society for the Revival of Ancient Music).
Weiss-Mann appeared as a harpsichord soloist with conductor Wilhelm Furtwängler and collaborated with composers Paul Hindemith and Heinrich Kaminski.
She recorded works by Telemann, Johann Christoph Pepusch, and Scarlatti for two versions of an LP released by Westminster: XWN 18589 and WL 5214.
Weiss-Mann sat at the black and gold harpsichord, her hands moving over the two keyboards as swiftly as dragonflies, one would have thought it easy to play with such accuracy.