de Bayreuth. The piano works often use arpeggiated figures, with the melody interspersed between the two hands, and include finger substitutions natural for organists. These aspects make them daunting for some pianists. Even a virtuoso like Liszt said that he found Fauré's music hard to play. The early piano works are clearly influenced by Chopin. An even greater influence was Schumann, whose piano music Fauré loved more than any other. In Copland's view, it was with the sixth Nocturne that Fauré fully emerged from any predecessor's shadow. The pianist Alfred Cortot said, "There are few pages in all music comparable to these." The critic Bryce Morrison has noted that pianists frequently prefer to play the charming earlier piano works, such as the Impromptu No. 2, rather than the later piano works, which express "such private passion and isolation, such alternating anger and resignation" that listeners are left uneasy. In his piano music, as in most of his works, Fauré shunned virtuosity in favour of the classical lucidity often associated with the French. He was unimpressed by purely virtuoso pianists, saying, "the greater they are, the worse they play me." Orchestral and chamber works Fauré was not greatly interested in orchestration, and on occasion asked his former students such as Jean Roger-Ducasse and Charles Koechlin to orchestrate his concert and theatre works. In Nectoux's words, Fauré's generally sober orchestral style reflects "a definite aesthetic attitude ... The idea of timbre was not a determining one in Fauré's musical thinking". He was not attracted by flamboyant combinations of tone-colours, which he thought either self-indulgent or a disguise for lack of real musical invention. He told his students that it should be possible to produce an orchestration without resorting to glockenspiels, celestas, xylophones, bells or electrical instruments. Debussy admired the spareness of Fauré's orchestration, finding in it the transparency he strove for in his own 1913 ballet Jeux; Poulenc, by contrast, described Fauré's orchestration as "a leaden overcoat ... instrumental mud". Fauré's best-known orchestral works are the suites Masques et bergamasques (based on music for a dramatic entertainment, or divertissement comique), which he orchestrated himself, Dolly, orchestrated by Henri Rabaud, and Pelléas et Mélisande which draws on incidental music for Maeterlinck's play; the stage version was orchestrated by Koechlin, but Fauré himself reworked the orchestration for the published suite. In the chamber repertoire, his two piano quartets, in C minor and G minor,