These sets were composed during several decades in his long career, and display the change in his style from uncomplicated youthful charm to a final enigmatic, but sometimes fiery introspection, by way of a turbulent period in his middle years.
His works for the piano are marked by a classical French lucidity;[6] he was unimpressed by pianistic display, commenting of keyboard virtuosi, "the greater they are, the worse they play me.
if there is a god for the left hand, I should very much like to know him and make him an offering when I am disposed to play your music; the 2nd Valse-Caprice is terrible in this respect; I have however managed to get to the end of it by dint of absolute determination.
[17] The authors of The Record Guide (1955) wrote that Fauré learnt restraint and beauty of surface from Mozart, tonal freedom and long melodic lines from Chopin, "and from Schumann, the sudden felicities in which his development sections abound, and those codas in which whole movements are briefly but magically illuminated.
"[13] The critic Bryce Morrison has noted that pianists frequently prefer to play the accessible earlier piano works, rather than the later music, which expresses "such private passion and isolation, such alternating anger and resignation" that listeners are left uneasy.
[14] Morrison notes that Fauré's nocturnes follow Chopin's model, contrasting serene outer sections with livelier or more turbulent central episodes.
[22] The pianist and academic Sally Pinkas writes that the work contains many hallmarks of Fauré's style, including "undulating rhythms, syncopation of the accompaniment against the melody and layered textures are already in evidence.
"[23] The second nocturne opens with a bell-like passage, andantino espressivo, recalling – although Fauré said it was unconscious – the sound of distant bells that he heard frequently when a boy.
[24][n 4] Nectoux singles out "the light footed episode in alternating fifths and sixths" and its extremely delicate passagework, and points to the influence of Fauré's former teacher Saint-Saëns in the allegro ma non troppo toccata section.
[16] The fourth nocturne, dedicated to the Comtesse de Mercy-Argenteau, contrasts a lyrical opening section and an episode in E♭ minor with a sombre theme recalling the tolling of a bell.
[29] Copland wrote that it was with this work that Fauré first fully emerged from the shadow of Chopin, and he said of the piece, "The breath and dignity of the opening melody, the restless C sharp minor section which follows (with the peculiar syncopated harmonies so often and so well used by Fauré), the graceful fluidity of the third idea: all these elements are brought to a stormy climax in the short development section; then, after a pause, comes the return of the consoling first page.
The nocturne, the last piece in the set of eight, is shorter and less complex than its immediate predecessor, consisting of a song-like main theme with a delicate semiquaver accompaniment in the left hand.
[34] The ninth nocturne, dedicated to Cortot's wife, Clotilde Bréal, is the first of three that share a directness and sparseness in contrast with the more elaborate structures and textures of their predecessors.
The composer applies the A–B–A form less rigorously than in earlier nocturnes, and the opening bars of the piece recur intermittently throughout, eventually building to a fierce climax, described by Morrison as "a slow central climb ... that inhabits a world of nightmare.
"[40] The work opens in a "pure, almost rarefied atmosphere" (Nectoux), with a "tone of noble, gentle supplication ... imposing gravity and ... rich expressive four part writing.
"[42] Nevertheless, following the precedents of Chopin and most conspicuously Mendelssohn,[n 5] Fauré made extensive use of the barcarolle, in what his biographer Jessica Duchen calls "an evocation of the rhythmic rocking and lapping of water around appropriately lyrical melodies.
"[44] Fauré's ambidexterity is reflected in the layout of many of his piano works, notably in the barcarolles, where the main melodic line is often in the middle register, with the accompaniments in the high treble part of the keyboard as well as in the bass.
[44] Like the nocturnes, the barcarolles span nearly the whole of Fauré's composing career, and they similarly display the evolution of his style from the uncomplicated charm of the early pieces to the withdrawn and enigmatic quality of the late works.
[48] It develops into a more elaborate form before the introduction of the second theme, in which the melodic line is given in the middle register with delicate arpeggiated accompaniments in the treble and bass.
[48] Duchen writes of the work as complex and questing, harmonically and melodically, and points to the influence of Saint-Saëns, Liszt and even, unusually for Fauré, of Wagner.
[53] The seventh barcarolle contrasts with its predecessor in being more restless and sombre, recalling Fauré's "Crépuscule" from his song cycle La chanson d'Ève.
[54] Nectoux writes that it consists of "a series of harmonic or polyphonic variations on a strange, sombre, syncopated theme, whose monotony recalls some sailor's song".
[57] Dedicated to Madame Léon Blum,[58] the tenth barcarolle stays more closely within conventional tonality than its predecessor, "with a certain sedate gravity ... the monotony appropriate to a grey evening" (Koechlin).
[54] Despite the increasing complexity of the polyphonic lines, Fauré keeps the melody prominent, and the piece ends with it transformed into "a theme of almost triumphal character" (Nectoux).
[62] Koechlin writes of it: "bare, superficially almost dry, but at heart most expressive with that deep nostalgia for vanished bright horizons: sentiments that the composer suggests in passing rather than comments on in loquacious or theatrical oratory; he seemed to desire to preserve the soothing and illusory serenity of the mirage.
There still remain touches of virtuosity and traces of Liszt, and these two valses-caprices are, in Orledge's words, the only solo pieces in the middle period to end in a loud and spectacular manner.
[70] The second romance, in A minor, an exuberant piece, has a strong semiquaver figure supporting the theme, and running high into the treble and low into the bass.
[90] The critic Michael Oliver wrote, "Fauré's Préludes are among the subtlest and most elusive piano pieces in existence; they express deep but mingled emotions, sometimes with intense directness ... more often with the utmost economy and restraint and with mysteriously complex simplicity.
Cochard quotes the earlier writer Louis Aguettant's description of this prélude as "This fine outburst of anger (Ce bel accès de colère)".
In the LP and particularly the CD era, the record companies built up a substantial catalogue of Fauré's piano music, performed by French and non-French musicians.