Frescobaldi, Partite sopra l’Aria della Romanesca: (a) the underlying melody and ostinato bass; (b) sesta parte (variation 6), mm. 1–3; (c) nona parte (variation 9), mm. 1–5. Asterisks mark the notes of the ostinato bass
Performed by the author:
(a) the Romanesca melody and bass line:
(b) Frescobaldi, sesta parte:
(c) Frescobaldi, nona parte: