This is purely my own analysis, and I’m no musical theorist. Feel free to contact me (or mail email@example.com) if you have thoughts of your own.
Ok, here is the clip, followed by the analysis. The movement between keys (“modulation” as it is known) is fast, so keep up!
- 00.00 We start in C (C7 as you would play on a guitar)
- 00.00 to F (C’s subdominant)
- 00.01 An E diminished chord
- 00.02 A Dm (the relative minor of F)
- 00.03 An Ab dimished
- 00.04 Back to C
- 00.05 And Ab (or D) diminished
- 00.06 Back to C
- 00.07 C minor
- 00.08 D major (D7)
- 00.09 F minor. The relative minor of Ab: these are quite distant jumps in key
- 00.09 G major, infact a G7. Which, as the dominant 7th, inevitably brings us back to C.
So there we have it, quite surprisingly bold leaps in key. But handled with such aplomb and cool by Mozart, that you hardly feel any sense of travel, or dislocation even though the modulations happen so rapidly.
Surprising and satisfying – as always with Mozart – in perfect harmony.
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