sentence: johann christoph friedrich bach , cantata ( 1769 ) br d 2 / wf xiv : 1 , based on ramler 's revised version from 1760 joseph martin kraus to his own libretto ( 1776 ) , in the sturm und drang style anna amalia , abbess of quedlinburg , used by johann kirnberger as models of counterpoint in his ( the art of pure intonation in music ) ( 1779 ) compositional style unlike bach 's passions , graun 's setting does not imbue the tenor soloist with the role of narrator or evangelist , nor is the bass cast as vox christi .