Kuhnau complained in 1717 that the trebles lost their voices before they had learned to use them.
The whole, evidently programme-music, is a sonata worked out somewhat on Kuhnau lines.
Kuhnau, in fact, however interesting a phenomenon in the musical firmament, is not necessary to explain the appearance of Bach.
Kuhnau worked his hardest to remedy this state of things, but without avail.
The two parts of the Clavier Exercises of Kuhnau appeared in 1689 and 1692.
