A dense, avant-garde composition that explores unusual soundscapes through unconventional notation and complex rhythmic layers. It is a highly avant-garde interpretation of a 'framed' musical structure.
Solving the complex rhythmic layering and maintaining independent voicing is the primary hurdle in this performance.
Comparable difficulty and character — good candidates for what to learn next.
Cadres inauditi (Op.2406) 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 Cadres inauditi (Op.2406) lasts about 6 minutes.
Cadres inauditi (Op.2406) 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 CORPUS ELECTRICUM by Jean-François Marcoux, CORPUS INERS by Jean-François Marcoux, Caesura vasta by Jean-François Marcoux — see the full similar-pieces list on this page.