The German notation system allows words and letters to be translated into music. This occurs with the four letters of the surname Bach, whose musical equivalent (Bb-A-C-B) gave rise to the so-called “BACH motive”. The composer himself made it up during his lifetime to sign some of his works, a symbolic and at the same time ironic game for initiated ears. Over time, these four notes have become an excuse to challenge composers’ contrapuntal skills and a tribute to the composer from Leipzig. Over one hundred composers have used it in close to 300 works, of which twenty or so are included in this series of new compositions.