Alkan's work is a tour-de-force of sonority, intended to imitate the rich, bell-like textures of a carillon. It features complex, layered writing and extreme register demands that create a unique, organ-like sonic impact.
Use deep arm weight to voice the heavy chordal textures clearly.
Bombardo-Carillon (Op.47) 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 10.
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 Bombardo-Carillon (Op.47) lasts about 6 minutes.
Bombardo-Carillon (Op.47) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.