Estimated from our difficulty score, not taken from an exam syllabus. Checked against 333 works on the ABRSM syllabus: the exact grade is right 7 times out of 10, and within one grade 99 times out of 100.
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This Valsa Brasileira no. 3 feels like a playful, slightly sly dance, alternating singing measures with intimate accents that suggest a salon waltz colored by Brazilian popular inflections. You will notably face polyrhythm 2 against 3 (3.1/5), where the right hand must sustain a steady ternary line while the left lays down binary duplet patterns, requiring steady beat subdivision and independent wrist control, and impressionistic style demands (3.1/5) that call for a nuanced touch and careful pedaling to shape colors without muddying the harmony. The piece comes from Mignone's modern-period piano output, part of his set of valsas that blend waltz tradition with local coloration. I do not give a recommended recording because I am not certain of a single widely recognized reference for this exact piece.