Louis Couperin's OL 15 is a refined exercise in Baroque keyboard textures featuring layered voices. It is musically notable for its precise command of dissonance, which provides an underlying tension throughout the piece.
At Henle 6 this is an advanced piece that assumes fluent technique and rewards mature interpretation. The main demands: independent voices that must each sing on their own line; ornaments that need to sound effortless, not squeezed in; and precise articulation — the difference between crisp and blurred is the piece.
Beyond that, expect fine finger independence within the hand.
Maintaining clarity in the inner voices while balancing the upper melodic line is essential.
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.
Lesser-known works by the same hand, at a comparable level.
Fantaisie, OL 15 is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 8.
You should be comfortable at Henle level 6 — meaning you can already play level 5–6 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 Fantaisie, OL 15 lasts about 2 minutes.
Fantaisie, OL 15 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 Fantaisie sur la Tierce du Grand Clavier, OL 58 by Louis Couperin, Fantaisie, Duretez by Louis Couperin, Fantaisie, OL 21 by Louis Couperin — see the full similar-pieces list on this page.