Composed as part of Bach's Clavier-Übung III, this duet showcases intricate counterpoint and chromaticism. Unlike simpler two-part inventions, it features an elaborate structure with multiple thematic statements and episodes, building dramatic tension through sophisticated modulations before resolving in a powerful cadence.
The Duetto No.4 in A minor, BWV 805, is part of Bach's Clavier-Übung III, a monumental collection of organ works focused on Lutheran catechism. The four duets are unique contrapuntal studies, possibly symbolizing the Four Elements or serving pedagogical purposes.