The Orgelbüchlein (Little Organ Book) BWV 599−644 is a set of 46 chorale preludes for organ — one of them is given in two versions — by Johann Sebastian Bach. All but three were written between 1708 and 1717 when Bach served as organist to the ducal court in Weimar; the remainder and a short two-bar fragment came no earlier than 1726, after the composer’s appointment as cantor at the Thomasschule in Leipzig.
The plan was for a collection of 164 settings of chorale tunes sung during the Church year so that each part of the year was represented. This number was not to be. The manuscript, which is now in the Staatsbibliothek, leaves a number of tunes as missing or "ghost" pieces. These have been added in the 21st century; this project took nine hours in the first complete performance, giving an idea of the potential scope of Bach's "little" book. The Orgelbüchlein as Bach left it is about 80 minutes. However, it spans the calendar and more importantly signals a maturity and new breadth in his compositional style, not only with regard to this instrument.
Each setting takes an existing Lutheran chorale, adds a motivic accompaniment, and quite freely explores form. Many of the preludes are short and in four parts, requiring only a single keyboard and pedal, with an unadorned cantus firmus. Others involve two keyboards and pedal. These include several canons, four ornamental four-part preludes with elaborately decorated chorale lines, and one prelude in trio sonata form.
Title page
Orgel-Büchlein
Worrine einem anfahenden Organisten
Anleitung gegeben wird, auff allerhand
Arth einen Choral durchzuführen, an-
bey auch sich im Pedal studio zu habi-
litiren, indem in solchen darinne
befindlichen Choralen das Pedal
gantz obligat tractiret wird. Dem Höchsten Gott allein' zu Ehren, Dem Nechsten, draus sich zu belehren. Autore Joanne Sebast. Bach p. t. Capellae Magistri S. P. R. Anhaltini- Cotheniensis. Little Organ Book In which a beginning organist receives given instruction as to performing a chorale in a multitude of ways while achieving mastery in the study of the pedal, since in the chorales contained herein the pedal is treated entirely obbligato.
In honour of our Lord alone
That my fellow man his skill may hone. Composed by Johann Sebastian Bach Capellmeister to his Serene Highness the Prince of Anhalt- Cöthen
History
Bach's formal training as a musician started when he was enrolled as a chorister at the Michaelskirche in Lüneburg in 1700–1702. Manuscripts in Bach's hand recently discovered in Weimar by the Bach scholars Peter Wollny and Michael Maul show that while in Lüneburg he studied the organ with Georg Böhm, composer and organist at the Johanniskirche. The documents are hand copies made in Böhm's home in tablature format of organ compositions by Reincken, Buxtehude and others. They indicate that already at the age of 15 Bach was an accomplished organist, playing some of the most demanding repertoire of the period. After a brief spell in Weimar as court musician in the chapel of Johann Ernst, Duke of Saxe-Weimar, Bach was appointed as organist at St. Boniface's Church (now called the Bachkirche) in Arnstadt in the summer of 1703, having inspected and reported on the organ there earlier in the year. In 1705–1706 he was granted leave from Arnstadt to study with the organist and composer Dieterich Buxtehude in Lübeck, a pilgrimage he famously made on foot. In 1707 Bach became organist at St. Blasius' Church in Mühlhausen, before his second appointment at the court in Weimar in 1708 as concertmaster and organist, where he remained until 1717.
During the period before his return to Weimar, Bach had composed a set of 31 chorale preludes: these were discovered independently by Christoph Wolff and Wilhelm Krunbach in the library of Yale University in the mid-1980s and first published as Das Arnstadter Orgelbuch. They form part of a larger collection of organ music compiled in the 1790s by the organist Johann Gottfried Neumeister (1756–1840) and are now referred to as the Neumeister Chorales BWV 1090–1120. These chorale preludes are all short, either in variation form or fughettas. Only a few other organ works based on chorales can be dated with any certainty to this period. These include the chorale partitas BWV 766-768 and 770, all sets of variations on a given chorale.