“This practical musicality was a comprehensive craft that involved thinking creatively and realizing it in sound. Music meant more than merely following instructions. The rote repetition of other people’s music, including Bach’s own, was used as example and was not the end itself. Students were encouraged to alter scores by adding notes, reducing the time value of notes, dropping notes, and changing or adding ornamentation, dynamics, and so on. One couldn't even get into Bach’s teaching studio without first showing some rudimentary composing ability.”