Bach-Werke-Verzeichnis in the context of "Johann Sebastian Bach"

A melody (from Greek μελῳδία (melōidía) 'singing, chanting'), also tune, voice, or line, is a linear succession of musical tones that the listener perceives as a single entity. In its most literal sense, a melody is a combination of pitch and rhythm, while more figuratively, the term can include other musical elements such as tonal color. It is the foreground to the background accompaniment. A line or part need not be a foreground melody.

Melodies often consist of one or more musical phrases or motifs, and are usually repeated throughout a composition in various forms. Melodies may also be described by their melodic motion or the pitches or the intervals between pitches (predominantly conjunct or disjunct or with further restrictions), pitch range, tension and release, continuity and coherence, cadence, and shape.

The Well-Tempered Clavier, BWV 846–893, consists of two sets of preludes and fugues in all 24 major and minor keys for keyboard by Johann Sebastian Bach. In the composer's time clavier referred to a variety of keyboard instruments, namely the harpsichord, the clavichord and the organ (which operates using air instead of strings), but not excluding the regal and the then newly-invented fortepiano.

The modern German spelling for the collection is Das wohltemperierte Klavier (WTK; German pronunciation: [das ˌvoːlˌtɛmpəˈʁiːɐ̯tə klaˈviːɐ̯]). Bach gave the title Das Wohltemperirte Clavier to a book of preludes and fugues in all 24 keys, major and minor, dated 1722, composed "for the profit and use of musical youth desirous of learning, and especially for the pastime of those already skilled in this study". Some 20 years later, Bach compiled a second book of the same kind (24 pairs of preludes and fugues), which became known as The Well-Tempered Clavier, Part Two (in German: Zweyter Theil, modern spelling: Zweiter Teil).

The six Cello Suites, BWV 1007–1012, are suites for unaccompanied cello by Johann Sebastian Bach (1685–1750). They are some of the most frequently performed solo compositions ever written for cello. Bach most likely composed them during the period 1717–1723, when he served as Kapellmeister in Köthen. The title given on the cover of the Anna Magdalena Bach manuscript was Suites à Violoncello Solo senza Basso (Suites for cello solo without bass).

As usual in a Baroque musical suite, after the prelude which begins each suite, all the other movements are based around baroque dance types. The cello suites are structured in six movements each: prelude, allemande, courante, sarabande, two minuets or two bourrées or two gavottes, and a final gigue. Gary S. Dalkin of MusicWeb International called Bach's cello suites "among the most profound of all classical music works" and Wilfrid Mellers described them in 1980 as "Monophonic music wherein a man has created a dance of God".

The Musical Offering (German: Musikalisches Opfer or Das Musikalische Opfer), BWV 1079, is a collection of keyboard canons and fugues and other pieces of music by Johann Sebastian Bach, all based on a single musical theme given to him by Frederick the Great (King Frederick II of Prussia), to whom they are dedicated. They were published in September 1747. The Ricercar a 6, a six-voice fugue which is regarded as the high point of the entire work, was put forward by the musicologist Charles Rosen as the most significant piano composition in history (partly because it is one of the first). This ricercar is also occasionally called the Prussian Fugue, a name used by Bach himself.

The Brandenburg Concertos (BWV 1046–1051) by Johann Sebastian Bach are a collection of six instrumental works presented by Bach to Christian Ludwig, Margrave of Brandenburg-Schwedt, in 1721 (though probably composed earlier). The original French title is Six Concerts avec plusieurs instruments, meaning "Six Concertos for several instruments". Some of the pieces feature several solo instruments in combination. They are widely regarded as some of the greatest orchestral compositions of the Baroque era.

The Sonatas and Partitas for Solo Violin (BWV 1001–1006) are a set of six works composed by Johann Sebastian Bach. They are sometimes referred to in English as the Sonatas and Partias for Solo Violin in accordance with Bach's headings in the autograph manuscript: "Partia" (plural "Partien") was commonly used in German-speaking regions during Bach's time, whereas the Italian "partita" was introduced to this set in the 1879 Bach Gesellschaft edition, having become standard by that time. The set consists of three sonatas da chiesa in four movements and three partitas (or partias) in Baroque suite dance-form movements. The 2nd Partita is widely known for its Chaconne, considered one of the most masterful and expressive works ever written for solo violin.

The set was completed by 1720 but was not published until 1802 by Nikolaus Simrock in Bonn. Even after publication, it was largely ignored until the celebrated violinist Joseph Joachim started performing these works. Today, Bach's 'Sonatas and Partitas are an essential part of the violin repertoire, and they are frequently performed and recorded.

The Goldberg Variations (German: Goldberg-Variationen), BWV 988, is a musical composition for keyboard by Johann Sebastian Bach, consisting of an aria and a set of thirty variations. First published in 1741, it is named after Johann Gottlieb Goldberg, who may also have been the first performer of the work.