After the Revolution, he emigrated to Paris in 1923 and directed a school of music for Russian émigrés, but died of a heart attack the following year. For many years the official Soviet line was that Lyapunov had died during a concert tour of Paris, no acknowledgement being made of his voluntary exile. Lyapunov is largely remembered for his Douze études d'exécution transcendente. This set completed the cycle of the 24 major and minor keys that Franz Liszt had started with his own Transcendental Études but had left unfinished. Not only was Lyapunov's set of études as a whole dedicated to the memory of Franz Liszt, but the final étude was specifically titled Élégie en mémoire de François Liszt. In the UK the pianist Edward Mitchell was an early advocate, first performing and broadcasting the Douze études in 1927. Louis Kentner made the premiere recording in 1949. Works Works with opus numbers Op. 1 – Three Pieces "Etude" in D major "Intermezzo" in E minor "Waltz" in A major Op. 2 – Ballade (orchestra; 1883; also arranged for 2 pianos) Op. 3 – Rêverie du soir in B minor Op. 4 – Piano Concerto No. 1 in E minor (1890) Op. 5 – Impromptu in A major Op. 6 – Seven Preludes (1896) Allegro risoluto in B major Vivace in G major Lento in E minor Allegro giocoso in B major Allegro grazioso in A major Andantino mosso in F minor Animato assai in D major Op. 7 – Solemn Overture on Russian Themes (1886) Op. 8 – Nocturne in D major Op. 9 – Two Mazurkas (1898) Op. 10 – 30 Russian Folksongs Op. 11 – 12 Transcendental Études (dedicated to Franz Liszt) "Berceuse" ("Lullaby") in F major "Ronde des Fantômes" ("The ghosts' dance") in D minor "Carillon" ("The bells") in B major "Térek" ("The river Terek") in G minor "Nuit d'été" ("Summer night") in E major "Tempête" ("The storm") in C minor "Idylle" in A major "Chant épique" ("Epic song") in F minor "Harpes éoliennes" ("The Aeolian harps") in D major "Lesghinka" in B minor "Ronde des sylphes" ("Dance of the sylphs") in G major "Élégie en mémoire de François Liszt" ("Elegy in memory of Liszt") in E minor Op. 12 – Symphony No. 1 in B minor (1887) Op. 13 – 35 Russian Folksongs (1897) Op. 14 – Four songs Op. 15 – Russian songs (1900) Op.