's St Matthew Passion,, is structured on multiple levels: the composition is structured in three levels of text sources and by the different forms that are used for musical expression. Bach's large choral composition was written to present the Passion, as told in the Gospel of Matthew, in a vespers service on Good Friday. It is composed in two parts, that were to be performed before and after the sermon of that service. Part I covers the events until the arrest of Jesus and Part II concludes with his burial and the sealing of his grave. Bach took the Gospel text for the composition from Martin Luther's German translation of and. Contemporary poetry in Picander's libretto and chorales comment on the Bible text and open and close most scenes of the narration.
Bach did not number the sections of the St Matthew Passion but twentieth-century scholars have done so. The Bach-Werke-Verzeichnis divides the work into 78 numbers, while the Neue Bach-Ausgabe divides the piece into 68 movements. Both use lettered subsections in some cases. Movement numbers in this article follow the NBA scheme, except for the table with the movements that cross-references both numbering systems.
Text based structure
The text is taken from three sources: the biblical texts, contemporary poetry by Picander and chorales.
Scene division based on the Gospel text
The St Matthew Passion can be divided in scenes or "stations" that follow the dramatic action of the Gospel account in different locations. Whatever the chosen scene division, scenes end on an aria, a chorus, or in the midst of a Gospel text section. In the latter case the ending of the scene would usually be on a turba chorus, such as #63b ending the scene where Jesus dies at the cross. New scenes begin with Gospel text sung by the Evangelist, except the first scene of each of the two parts of the composition. In other words, except for the chorus and aria that open Part One and Part Two, chorales and arias are a meditation after the narration of the action in the sung Gospel text.
Libretto
, who collaborated with Bach, wrote text for recitatives and arias, and for the large scale choral movements that open and close the Passion. Other libretto sections came from publications by Salomo Franck and Barthold Heinrich Brockes. Scenes can be opened and closed by arias: No. 6 Buß und Reu, an aria for alto, concludes the scene at Bethany. Part II opens with an aria, #30.
Chorales
The oldest chorale chosen for the Passion dates from 1525. Bach used the hymns in different ways, most are four-part setting, two are the cantus firmus of the two chorale fantasias framing Part I, one as a commenting element in a tenorrecitative. Three of the texts Bach used for chorale settings are written by Paul Gerhardt. Bach included five stanzas of his "O Haupt voll Blut und Wunden" in the Passion, and he uses the [|first two stanzas of the poem] to conclude the Flagellation scene.
Musical structure
The work is composed for double choir, double orchestra, and vocal soloists. The choirs are abbreviated Ch I and Ch II, individual voice parts as S, A, T, and B. Both choirs are four-part, SATB. The orchestra consists of woodwinds, strings, and basso continuo. Woodwinds are recorders, flauto traverso , oboe, oboe d'amore, and oboe da caccia. Strings are violin, solo violin, viola, lute, and viola da gamba. Continuo are violoncello, double bass, bassoon, and organ. The Bible story is told by the Evangelist in secco recitative, and by the characters that have direct speech in the narrative. The speech of Jesus sings in accompagnato recitative, except at the beginning of No. 61a where Jesus utters his last words "Eli, Eli, lama, lama asabthani" in recitative secco. The speech of other persons, called soliloquents, is also set as secco recitative. Soliloquents are Judas, Peter, two witnesses, two high priests, two maids, Pilate, and his wife. The speech of groups such as the disciples and the crowd, are expressed in turba choruses. Reflecting thoughts on contemporary poetry appear as sequence of recitatives and arias, sometimes just the latter, and in choral movements. Most chorales are four-part settings. Several movements use a combination of forms, such as an aria with chorale, a chorale fantasia, a chorus with a chorale as a cantus firmus. Chorales were performed by both groups combined, with each voice type in unison. Movement 63b, Wahrlich, dieser ist Gottes Sohn gewesen, is treated the same way. Part I ends with a chorale fantasia that is based on the opening chorus of the St John Passion in its second version, also performed by both choirs in unison, whereas the opening chorus is for double choir with the chorale "O Lamm Gottes, unschuldig" as the cantus firmus, which was originally played, later sung. The closing chorus is in da capo form for two choirs.
Movements
Column 1 of the table is the movement number in the Neue Bach-Ausgabe; column 2 is this number in the Bach-Werke-Verzeichnis. The last column shows the incipit, the first measures of each movement with text.
