Douleur et gaîté contrasts sorrow and joy through distinct shifts in mood and harmonic color, typical of 19th-century salon character pieces. It is distinct for its quick shifts between reflective, minor-mode melancholy and bright, major-key brightness.
At Henle 4 this is an intermediate piece that expects secure technique and real attention to phrasing. The main demands: precise articulation — the difference between crisp and blurred is the piece; sharp dynamic and character contrasts held together in one arc; and fast passage work that stays light and even at tempo.
Beyond that, expect fine finger independence within the hand.
The main technical difficulty lies in executing the sudden shifts in character and articulation between the sorrowful and joyful sections.
Comparable difficulty and character — good candidates for what to learn next.
A level or two down with the same spirit — ideal if this piece is still out of reach.
Where this piece's skills lead: slightly harder works making similar technical demands.
Douleur et gaîté is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 6.
You should be comfortable at Henle level 4 — meaning you can already play level 3–4 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Douleur et gaîté lasts about 4 minutes.
Douleur et gaîté is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Die Parade der Zinnsoldaten by Léon Jessel, 12 Variations on "Ah vous dirais-je, Maman" by Wolfgang Amadeus Mozart, Alexander's Ragtime Band by Irving Berlin — see the full similar-pieces list on this page.