After analyzing Grande Valse Brillante Op. 18, I noticed something about the form of the waltz. I thought at first, that this waltz by Chopin is in ternary form, like most dance pieces. However, there is a second middle section that makes me doubt the ternary form hypothesis. There is another thing that I noticed which is also atypical for a waltz. That would be a dominant lock or dominant preparation. This further made me doubt that it is just in an atypical ternary form. Here is what I saw in each section:
Introduction: Measures 1-4
First Theme of A section: Measures 5-20
Second Theme of A section: Measures 21-37
First Theme again: Measures 38-52
Second Theme again: Measures 53-69
First Theme of B section: Measures 70-85
Second Theme of B section: Measures 86-102
First Theme again: Measures 103-118
Digression Theme: Measures 119-134
Cadenza: Measures 136-151
Digression Theme again: Measures 152-167
Gb Major passage: Measures 168-183
Dominant Lock: Measures 184-192
First Theme of A section again: Measures 193-208
Second Theme of A section again: Measures 208-224
First Theme again: Measures 225-241
Coda: Measures 242-311
If you tried to fit this into Ternary Form, it just wouldn't work. The Digression is too far apart from the B section to act like an extension of it. And the Dominant Lock really confirms that this isn't in Ternary Form on the large scale(as in, the entire piece). However, if you tried to fit this into Sonata Form, this is what you would get:
Introduction: Measures 1-4
Exposition(A section): Measures 5-69
Development(B section + Digression): Measures 70-192
Recapitulation(A section): Measures 193-241
Coda: Measures 242-311
Now, that seems a lot more reasonable than trying to fit it into Ternary Form. But, waltzes, even Romantic Period waltzes are typically in Ternary Form. And this is the earliest published waltz by Chopin and second most well known waltz by Chopin.
Here is my complete formal and harmonic analysis of the piece if you want to see it. I didn't use Sonata Form terms for my analysis, but did clarify that I feel that this Waltz is in a form very similar to Sonata Form.
https://musescore.com/user/50070/scores/5833250
How is Chopin able to mesh together Sonata Form and the waltz so well? Sonata Form isn't typically used for any type of dance, not even the most elaborate of them. And yet, Chopin is able to mesh together Sonata Form and the waltz very well in Grande Valse Brillante Op. 18 How?