Wolfgang Amadeus Mozart’s relationship with the “De profundis” text centers primarily on the sacred motet De profundis clamavi, K. 93 (also cataloged as K. Anh. A 22). Composed in C minor, this solemn work carries a fascinating narrative that highlights both the rigorous academic training of a young musical genius and the complex historical detective work involved in cataloging his immense body of work.
A Masterclass in Traditional Polyphony
Historically dated to 1771 during Mozart’s teenage years in Salzburg, De profundis clamavi was composed for a traditional four-part mixed chorus (SATB) accompanied by string orchestra and organ continuo. Structurally, the piece is a masterclass in the stile antico—the traditional, strictly regulated polyphonic style modeled after Renaissance masters like Palestrina. Rather than incorporating the operatic, theatrical flares that defined much of the Late Baroque and Classical church music of the era, the setting relies heavily on academic containment.
The composition utilizes a traditional, rigid cantus firmus structure, where a sustained, step-wise melody serves as the anchor while the surrounding vocal lines weave complex, imitative counterpoint around it. This design creates a stark, austere atmosphere perfectly aligned with the grim urgency of Psalm 130. The Choice of C minor underscores this solemnity, establishing a dark tonal center that mirrors the human soul crying out from the abyss before shifting toward an architectural clarity that hints at divine redemption.
The Mystery of Authorship
The most compelling historical chapter of Mozart’s De profundis, however, is its disputed authorship. When Ludwig von Köchel compiled his first comprehensive chronological catalog of Mozart’s works in 1862, he included K. 93 as an authentic youthful composition. However, later 20th-century musicological research revealed a twist: the piece was not an original creation, but rather a meticulous, handwritten arrangement made by Mozart.
The original piece was actually composed by Georg von Reutter the Younger, an influential Austrian Baroque composer who served as the Kapellmeister at St. Stephen’s Cathedral in Vienna. As a young prodigy, Mozart frequently copied, transcribed, and re-orchestrated the manuscripts of master composers to study their voicing, harmonic progressions, and contrapuntal architecture. Because Mozart’s personal study score was preserved in his handwriting, early scholars mistook it for an original Salzburg composition.
Legacy and Contemporary Footprint
Despite being reclassified into the appendices of the Köchel catalog as a misattribution (Anhang), the piece remains deeply tied to Mozart’s performance legacy. The work offers invaluable insight into the rigorous historical foundations that shaped the young composer. The strict vocal voice-leading, counterpoint mechanics, and emotional discipline Mozart absorbed while transcribing Reutter’s De profundis directly paved the way for his mature sacred masterpieces. Echoes of this austere, archaic style can be heard decades later in the devastating, contrapuntal choral movements of his final, unfinished masterpiece, the Requiem, K. 626. Today, the piece is frequently performed by classical ensembles worldwide, standing as a beautiful monument to the rigorous training of history’s greatest musical prodigy.
