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A chacona was a quick saucy dance imported to Spain from South America about 100 years before this piece was written, and over the next 2 centuries it evolved through a stately 3/4 dance into an instrumental form (the chaconne). It seems to be indistinguishable from a passacalle or passacaglia, which also originated in Spain and followed a similar evolution.
It consists of nine, 4-bar phrases variations based (except for the last) on the following approximate harmonic sequence, which was not rigidly imposed, and has other passing chords in the piece:
I | V or vi or ii | vi or IV or ii | V(7) ||
In each variation, the four bars follow a particular pattern following the harmony, rather like a riff in jazz.
You can find the transcriptions here:
- pdf (quick preview)
- pdf (auto download)
- TablEdit
- MIDI (sorry about the trills, which sound more like tremolos)