This early Baroque composition is a poignant example of the stile moderno vocal-to-keyboard transcription. It is notable for its expressive chromaticism and reliance on affective, rhetorical musical gestures.
Students must master the execution of period-appropriate ornaments while maintaining a legato vocal quality.
Comparable difficulty and character — good candidates for what to learn next.
"Udite lagrimosi spirti d'Averno, udite" 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 "Udite lagrimosi spirti d'Averno, udite" lasts about 4 minutes.
"Udite lagrimosi spirti d'Averno, udite" 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 Gymnopédie No. 1 by Erik Satie, Gymnopédie No. 2 by Erik Satie, Gymnopédie No. 3 by Erik Satie — see the full similar-pieces list on this page.