A late-Romantic waltz composed by a Brazilian contemporary of the period. It utilizes standard salon-style chordal accompaniments and melodic ornamentation.
The primary challenge is balancing the bass accompaniment with the expressive, swaying melodic line.
Comparable difficulty and character — good candidates for what to learn next.
Altiva (Op. 149) is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 5.
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 Altiva (Op. 149) lasts about 4 minutes.
Altiva (Op. 149) 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 Bohême by Aurélio Cavalcanti, Buenos dias by Aurélio Cavalcanti, Arrependida by Aurélio Cavalcanti — see the full similar-pieces list on this page.