Musikhochschule (Konzertdiplom) in Frankfurt, Germany, and the Eastman School of Music (D.M.A.).  In 2002, Harbach received an honorary doctorate in music, honoris causa, from Wilmington College, Ohio. 

Her lively performances and recordings have captured the imagination of many American composers, and the body of work written for and dedicated to Harbach is substantial.  Musical America has called her “nothing short of brilliant,” and Gramophone has cited her as an “acknowledged interpreter – and, indeed, muse – of modern harpsichord music.”  She was host of the weekly television music series Palouse Performance seen throughout the Inland Northwest. 

As a composer, Harbach has written symphonies, works for chamber ensemble, string orchestra, organ, harpsichord; musicals, choral anthems, a film score, a modern ballet, and many arrangements for brass and organ of various Baroque works.  In 2004, her first symphony, Veneration for Orchestra, was premiered at Wilmington College, Ohio, and her second symphony, One of Ours – a Cather Symphony, was premiered by the Central Wisconsin Symphony Orchestra.

She is also involved in the research, editing and publication of manuscripts of eighteenth century keyboard composers.  Her work is available in both recorded and published form through Naxos Records, Gasparo Records, Kingdom Records, Albany Records, Northeastern Records, Hester Park, Robert King Music, Elkan-Vogel, Augsburg Publishing, Agape Music and Vivace Press.