This is an exercise in contrary motion, one part
picking its way up the scale while the other descends,
off the beat. The theme then essentially repeats the
same pattern, but now mostly in triplets, providing a
bit of contrast. Bach recycles these two segments
several times, always starting from a different point
on the scale, perhaps pushing the piece -- at about
three and a half minutes, the longest of the inventions
-- beyond the capacity of its modest material.
Although originally composed for Harpsichord, I created
this arrangement for Viola Duet.