It cannot be exactly maintained that Bach treated the clavier wholly individually, but he nevertheless has helped to individualise it. At the beginning of last century, when the clavier was still for the most part an accompanying instrument, when it sustained in the orchestra the foundation-harmonies, even if at the same time another clavier entered in concerto-wise, genius itself could not release the instrument from this corporate conception without running against the whole spirit of the time. It is remarkable how Bach left it the character of a thorough-bass instrument, and yet allowed it so much independence. It has at one time the divided nature of the unifying organ, as organ-pieces were then regarded still as practically ready for the clavier; at another the pizzicato and running character of the lute. Bach could entitle his formally interesting E flat major piece, Prelude, Fugue, and Allegro (Steingräber, vii. 30) as Prélude pour le luth _ò çembal_.[91] From the traditions of the lute and organ the peculiar nature of the clavier comes into existence, and it was in the maintenance of the _via media_ between these less delicately expressive extremes that its future lay. How _individually_ Bach regarded the clavier is seen in the pieces in which it is combined with flute and viol da gamba or violin, or in the concertos with one, two, three, or even four claviers. Among these the C major and D minor concertos with three claviers, now combined, now isolated, represent the highest points of this older form of the concerto, as yet not adapted for solo-virtuosity. But yet plainer is his insight in the direct transcriptions which he has made of violin pieces for the clavier. He interpolates in the freest fashion middle voices, which are kept together by “pedals;” ornamentations which draw out the air of the melody in clavier-style; or rapid vibrating over-parts which make up for the loss of the long-drawn violin tones. And by this insight into the peculiar character of the clavier, he makes it more capable not only of speaking with its own voice, but also of spreading over wider circles the literature of other instruments by means of suitable and self-intelligible transcriptions. Bach’s extreme love of this instrument, which so often gave him the means of expression for his musical conceptions, contributed not the least to such an interpretative mission. Slowly the world accustomed itself to understand music, not _per chorum_, but _per instrumentum_.