Finishing Bach’s Organ Music, With Help From 118 Composers

One of the most enduring mysteries that Johann Sebastian Bach left for us comes in the form of his “Orgelbüchlein,” a collection of chorale preludes for organ.

From autograph manuscripts that detail titles of the chorales, it’s clear that Bach planned to compose 164 of them, spread throughout the Christian liturgical year. But he wrote only 46 such pieces, leaving 118 mysteriously untouched.

A completely satisfactory explanation doesn’t exist. But a 15-year project to finish what Bach began — from a decidedly 21st-century perspective — is nearing its conclusion: The whole collection recently premiered in Britain, and Edition Peters will soon publish the sheet music in full.

“The project is nothing if not kaleidoscopic,” said William Whitehead, who curated the new collection. “It’s eclectic in capital letters.”

Where pianists who play Bach’s music have “The Well-Tempered Clavier,” organists have the “Orgelbüchlein” — German for “Little Organ Book,” which consists of the chorale preludes BWV 599-644. Today, the “Orgelbüchlein,” as close as Bach ever came to a full hymnal, is a cornerstone of the organ repertory.

As a teaching manual and a compositional model, “the ‘Orgelbüchlein’ has influenced composers ever since Bach taught the music to his pupils,” said Russell Stinson, an emeritus professor of music at Lyon College and the author of a monograph on the collection. “Certain works from Johannes Brahms’s ‘Eleven Chorale Preludes for Organ’ (Op. 122) unmistakably bear the stamp of Bach’s ‘Orgelbüchlein.’”

The exercise of taking a single-verse chorale melody and turning it into a brief, often elaborate prelude, was followed by composers including Robert Schumann, Max Reger and Anton Webern. Evidence exists of a setting of Bach’s “O Ewigkeit, du Donnerwort” by Webern from 1906, at the prompting of his teacher Arnold Schoenberg.

Whitehead’s own “Orgelbüchlein” project was inspired by a 17-year-old student of his who wrote an “Orgelbüchlein”-style chorale prelude on the English carol “Of the Father’s Heart Begotten” about 15 years ago.

“I remember listening to it thinking: If this 17-year-old kid can do this, why can’t we get the cream of European composers to put their minds to this task, and see if we can fill in all these tantalizing gaps?” Whitehead said. The finished collection features a host of eminent composers, representing a range of aesthetics: Gerald Barry, John Rutter, Louis Andriessen, Thea Musgrave and Kalevi Aho all respond to the same brief. So did the American musician Nico Muhly.

The collection started as a collaboration between the organ and composition departments of Trinity College London, where Whitehead was teaching at the time. After getting a few established composers on board (Giles Swayne and Judith Bingham were early supporters), it became clear to Whitehead that the project was worth seeing through completely.

That started what Whitehead called an “archaeological expedition” — searching for the hymns and plainchants Bach intended to set but that have since disappeared or gone out of fashion. The research also involved consulting multiple existing editions of Bach’s “Orgelbüchlein,” to which Whitehead and the project’s academic adviser, John Scott Whiteley, have contributed a new discovery: a single held note, added to the tenor voice in the penultimate bar of “Wer nur den lieben Gott lässt walten” (BWV 642), that is currently omitted from modern editions.

Whitehead organized thousands of notes contributed by 118 composers, all of which are separated into themed volumes. (The third, “Catechism, Penitence and Communion,” was released at the end of September.) Coming up with an assignment for contributors was difficult; leaving it at “something modern in your own style that reflects the ethos of the ‘Orgelbüchlein’” seemed too sparse, Whitehead said.

The key to success, Whitehead said, was to find “a single idea pursued to the ultimate degree.” He added, “Many composers manifestly told me they found it a very difficult task indeed.”

Whitehead also sought contributions from figures outside the world of contemporary composition: figures like Andreas Fischer and John Butt, who are more commonly associated with research or performance. A variety of responses followed accordingly. Andrew Keeling’s chorale, for example, took inspiration from reggae; James O’Donnell contributed a deft Brahms imitation; the baritone and composer Roderick Williams chose to reflect the quotidian in what Whitehead described as a “wonky tango.”

“Contributing as a composer to a project such as this is so hugely intimidating,” Williams, who set “Ich weiss ein Blümlein hübsch und fein,” said in an email. He added, “There was never any point in trying to replicate Bach’s invention, his contrapuntal skill or the theological profundity of his response. So I chose a different tack; comparing our digital 21st century to Bach’s age suggested a response from me that reflects some of today’s values (or lack thereof).”

Whitehead has been less daunted, and wears the implications of completing Bach lightly. “Once you’ve taken the ‘Orgelbüchlein’ out of the church setting, why not recreate the ethos in a secular way or jocular way?” he said. “Nearly all of the pieces are in a musical style Bach wouldn’t immediately recognize, so, there’s a kind of distancing ‘ab initio’ in the project.”

For others, like the composer Roxanna Panufnik, who contributed a setting of Severus Gastorius’s melody “Was Gott tut, das ist wohlgetan,” the project was an opportunity to bring her closer to Bach. “For me, he is the master,” she said in an email. “His music always, without fail, instills a feeling that all is well in the world, and I feel his harmonic language is more Romantic than that of the Romantics.”

Whitehead made a similar point when he said that “the ‘Orgelbüchlein’ pieces are dense technical exercises on one level, but are poetic explorations of symbolism, too — if you’ve defined ‘affekt’ in the rather general way, that it’s a mood picture.” Panufnik’s approach was to avoid close study of the text in favor of her own independent harmonization of the set chorale, one of a number of varied responses to Whitehead’s hope of creating what he described as a “unified sense of ‘affekt.’”

Finding emotional unity across over a hundred composers was always going to be impossible, but contributors seemed buoyed by that fact. “Anything that brings our wonderfully and stylistically diverse composer community together is a good thing,” Panufnik said, adding, “I feel we should all be collaborating on projects more often.”