-Usually baroque trio sonatas have a fourth performer playing a continuo on harpsichord, to fill in harmonic gaps. Stravinsky uses whole orchestra to blur and fill harmonies.
-The tonic key of the Sinfonia is G major.
-At many points, the tonality is complicated by added note dissonances, such as the A in the G major chord in bar 3. This technique is also used to destabilise some perfect cadences
-There is also a circle of fifths in bars 7-9.
The Gavotta is in D major, and does not modulate.
-Added note dissonances are also used.
This movement also includes retardations (suspensions which resolve upwards), such as in bar 2
The Vivo is in F major, and this tonality is established by the use of bare harmonies in the opening – the accompanying instruments play the root notes of chords in unison or octaves, while the solo melodies fill in the rest of the chord.
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