Girtain's Entropy is a minimalist-leaning work that relies on slow harmonic evolution. It is distinguished by its quiet, hypnotic quality and careful management of sustain.
At Henle 4 this is an intermediate piece that expects secure technique and real attention to phrasing. 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 rubato that must breathe naturally without losing the pulse.
The challenge lies in controlling the long decay of notes while maintaining a consistent emotional arc.
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.
Entropy 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 Entropy lasts about 3 minutes.
Entropy 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 Cold October by Edgar Girtain IV, Choric Song of the Lotos Eaters by Edgar Girtain IV, Dance Piece by Edgar Girtain IV — see the full similar-pieces list on this page.