J S Bach wrote his “Inventions and Sinfonias” as musical exercises for his pupils.They are a collection 30 short keyboard pieces, 15 in two part writing and 15 in three part.They are more commonly known as the two part and three part inventions. The two groups of pieces are both arranged in order of ascending key, each group covering eight major and seven minor keys. The inventions lend themselves to duet transcriptions and I have done so for a number of them using a clarinet duet of 2 standard clarinets. I have also transposed the clarinet parts so they are playing in the same keys as the original keyboard i.e. No 1 which is in Concert C has been transposed into Concert Bb, so the clarinets are playing in C.This arrangement is the exception: the clarinets are playing in F. They are all excellent exercises in playing scales in their varying keys.Individual inventions are available as well as collections! I have taken some liberties with the 2nd part at the octave, but avoided any clash with the 1st part. The opt. bass clarinet refelct the original keyboard L.H. I have also shortened some of the tied notes to give a wind player somewhere to breath: the piece retains it’s "Bach" feel!