IJL 20 is a substantial concert work by Lauber, building upon the structural complexity of his earlier fantasy. It features a sophisticated development of themes requiring advanced voicing and dynamic control.
At Henle 7 this is a late-advanced work — the technical demands are serious and sustained. The main demands: sharp dynamic and character contrasts held together in one arc; octave passages that demand a relaxed wrist to avoid tension; and big chords that need weight without harshness.
Beyond that, expect chord voicing — bringing out one note inside a handful of others, and a true singing tone, with the melody floating above the accompaniment.
At roughly 11 minutes, stamina and memory become part of the challenge — plan practice in sections.
The technical challenge lies in managing the thick layered textures without sacrificing melodic clarity.
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.
Fantaisie de concert, IJL 20 is rated Henle level 7 of 9 — late advanced repertoire, roughly ABRSM grade 8 and above. In the RCM system it corresponds to about level 9.
You should be comfortable at Henle level 7 — meaning you can already play level 6–7 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 de concert, IJL 20 lasts about 11 minutes.
Fantaisie de concert, IJL 20 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 de concert, IJL 14 by Joseph Lauber, Fantaisie by Joseph Lauber, Fantaisie de Concert by Joseph Lauber — see the full similar-pieces list on this page.