This work explores sonic textures and silence as structural elements. It is distinct for its experimental approach to harmonic sustain and spatial arrangement of sound.
At Henle 7 this is a late-advanced work — the technical demands are serious and sustained. The main demands: a true singing tone, with the melody floating above the accompaniment; careful pedaling — clarity depends on the foot as much as the fingers; and several simultaneous layers, each needing its own dynamic level.
The primary challenge is managing resonance and the timing of releases to maintain an atmospheric quality.
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.
Extrem 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 8.
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 Extrem lasts about 4 minutes.
Extrem 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 Extrem, WVE-29j by Shigeru Kan-no, Prelude in D-flat major, No. 15 by Frédéric Chopin, Falling Music by Frederic Rzewski — see the full similar-pieces list on this page.