Work: 6 Intermezzi, Op. 45
Composer: Max Reger (1873–1916)
Work: Lieder ohne Worte, Op. 62: 1. Andante espressivo
Composer: Felix Mendelssohn (1809–1847)
Work: 6 Lieder, Op. 85: 2. Mondenschein
Composer: Johannes Brahms (1833–1897)
Work: 6 Lieder, Op. 56: 2. Im Spätboot
Composer: Richard Strauss (1864–1949)
Work: 6 Duets, Op. 11: 1. Barcarolle in G Minor
Composer: Sergei Rachmaninoff (1873–1943)
Work: 6 Lieder, Op. 49: 3. Vom Berge
Composer: Robert Franz (1815–1892)
Work: Cello Sonata in F Major, Op. 6: 1. Allegro con brio
Work: Six Sketches
Composer: Severin Turel (1906–1958)
Work: Preludes for String Quartet (c. 1990)
Composer: David N. Patterson
Work: 6 Duets, Op. 63: 3. Gruss
Work: Lieder ohne Worte, Op. 62: 3. Andante maestoso, "Trauermarsch"
Work: Lieder ohne Worte, Op. 53: 5. Volkslied. Allegro con fuoco
Work: 6 Etudes de Concert, Op. 11
Composer: Agathe Backer-Grøndahl (1847–1907)
Work: Three Little Fantasies, Op. 6a
Composer: Oliver Knussen (1952–)
Work: Recitative and Scherzo, Op. 6
Composer: Fritz Kreisler (1875–1962)
Work: Chansons villageoises, FP 117: 6. Le retour du sergent
Composer: Francis Poulenc (1899–1963)
Work: Sex sånger: Lokkende toner, Op. 3, No. 6 ("Enticing Sounds")
Composer: Halfdan Kjerulf (1815–1868)
Work: 6 Épigraphes antiques: Pour remercier la pluie au matin
Composer: Claude Debussy (1862–1918)
Work: Mikrokosmos, Vol. 6: Dance in Bulgarian Rhythm No. 4, BB 105, No. 151
Composer: Béla Bartók (1881–1945)
Work: Sonata a cinque in G Minor, Op. 2, No. 6
Composer: Tomaso Giovanni Albinoni (1671–1751)
Work: 6 Lieder, Op. 97: 2. Auf dem Schiffe (-. 1885)
Work: Songs of the Infatuated Muezzin, Op. 42: 6. You departed into the eastern desert
Composer: Karol Szymanowski (1882–1937)
Work: Lyric Pieces, Book IV, Op. 47: 6. Springtanz
Composer: Edvard Grieg (1843–1907)
Work: Nocturne in D Minor, Op. 19, No. 4
Composer: Pyotr Ilyich Tchaikovsky (1840–1893)
Work: Péchés de vieillesse, Vol. 10, Miscellanée pour piano: 6. Petite caprice (style Offenbach) (c. 1880 - 1885)
Composer: Gioachino Rossini (1792–1868)
Work: 8 Preludes: 6. Andantino grazioso
Composer: Frank Martin (1890–1974)
Work: 6 Lieder, Op. 59: 5. Ruhetal
Work: Symphony No. 6
Composer: Peter Mennin (1923–1983)
Work: Sechs Gesänge, Op. 89: 1. Es stürmet am Abendhimmel
Composer: Robert Schumann (1810–1856)
Work: Lieder ohne Worte, Op. 53: 6. Molto allegro vivace
Work: Dessus le marché d'Arras
Composer: Orlande de Lassus (1532–1594)
Work: Sonatina, Op. 6
Composer: Robert Kurka (1921–1957)
Work: Musical Offering, BWV 1079: 5. Fuga (Ricercata) a 6 voci
Composer: Johann Sebastian Bach (1685–1750)
Arranger: Anton Webern (1883–1945)
Work: 6 Gesänge, Op. 14: 3. Waldfahrt (c. 1860)
Work: 6 Canciones al estilo popular: 5. Canción del carretero (c. 1924)
Composer: Carlos López Buchardo (1881–1948)
Work: 6 Gesänge, Op. 3: 6. Ach, wenn ich doch ein Immchen wär
Work: 6 Chansons: 1. La biche
Composer: Paul Hindemith (1895–1963)
Work: Albumblätter, Op. 124: 6. Wiegenliedchen. Nicht schnell
Work: 6 Armenian Dances
Composer: Komitas Vardapet (1869–1935)
Work: 6 Poemas arcaicos, Op. 35: 3. De las Sierras
Composer: Manuel Ponce (1882–1948)
Work: Canciones clásicas españolas, Vol. 1: 6. Del cabello más sutil
Composer: Fernando Obradors (1897–1945)
Work: 6 Songs, Op. 36: 1. Svarta rosor (Black Roses)
Composer: Jean Sibelius (1865–1957)
Work: 6 Lieder, Op. 15: 1. Meine Lieder, meine Sänge, Op. 15, No. 1
Composer: Carl Maria von Weber (1786–1826)
Work: 6 Romances, Op. 38: 3. Sred shumnovo bala (Amid the din of the ball)
Work: 6 Lieder, Op. 48: 4. Die verschwiegene Nachtigall
Work: 6 Romances, Op. 73: 2. Noch (Night)
Work: 6 Piano Pieces: 1. Albumblatt. Allegretto
Composer: Joseph Marx (1882–1964)
Work: Hexaméron, S. 392 (piano and orchestra version)
Composer: Carl Czerny (1791–1857)
Work: Concerto Grosso in F Major, Op. 6, No. 9: Gigue
Composer: George Frideric Handel (1685–1759)
Work: Folk Song Arrangements, Vol. 6, England: 6. The Shooting of his Dear
Composer: Folk Song
Arranger: Benjamin Britten (1913–1976)
Work: 6 Romances, Op. 16: 2. Pogodi! (Wait!)
Work: 6 Lieder, Op. 97: 1. Nachtigall
Work: 6 Moments Musicaux, Op. 16: 1. Andantino, B-flat minor 1 asset
Work: Winterreise, S. 561: 6. Wasserflut
Composer: Franz Schubert (1797–1828)
Arranger: Franz Liszt (1811–1886)
Work: 12 Gesänge, Op. 4: 6. Du hast mich verlassen
Work: Fantasy No. 6 in D Minor, TWV 40:7
Composer: Georg Philipp Telemann (1681–1767)
Work: Etudes after Paganini Caprices, Op. 3: Etude (unspecified)
Work: Cello Sonata in B-flat Major, RV 46
Composer: Antonio Vivaldi (1678–1741)
Work: Chamber Symphony No. 6, Op. 79
Composer: Darius Milhaud (1892–1974)
Work: Concerto Grosso in B Minor, Op. 6, No. 12, HWV 330