Great job Carlos, it's clear that you have mastered the sonata form and I don't need to tell you that; you are clearly aware of it, but I think it's nice to hear it said.
That being said, some questions to align myself on the terminology
Carlos wrote:EXPOSITION - First theme: from 1 to 8 -
Transition: from 9 to 12 -
I would note that these four bars are used by Mozart as a liquidation at the end of the 1st movement (bars 201 ff.).
He also does this, albeit in a different way, in Symphony K 550 in G minor, where he uses the main motif (Eb D D etc.) as a cadence at the end of the development to introduce the recapitulation.
Would you still maintain the definition of Transition?
Carlos wrote:Dominant pedal: from 23 to 27 -
Modulating bridge in the key of the dominant: from 28 to 32 -
I have a mania for simplifying, but, strictly speaking (perhaps I'm saying something silly), does a "modulating bridge" make sense after one has already arrived at the dominant? In my opinion, from 23 to 37 we are simply in the presence of a transition section whose purpose is to confirm the key of the dominant to prepare for the entry of the 2nd theme. As usual, I'll do a check (the litmus test): let's eliminate all bars from 23 to 31 and try to play by joining 22 to 32. Does it work? Yes: it sounds bad, but it works, because at 22 Mozart has already arrived at the dominant and only needs those ten bars to reinforce that harmony.
Clear, but I ask:
Only at a certain point is there a modulation, which you indicate at bar 22, and indeed the second chord is V56 of E+. However:
- at bar 28 there is a clear cadence in A+ namely V I
- the first chord of 22 is a II of A+
From my point of view, the second chord of 22 is still a V/V of A+
The real modulation, from which A+ will no longer be heard as the tonic, is precisely the second chord of 28, where the V/V of E+ appears, a strong tonicization that closes with its resolution at 32.
Usually, secondary dominants reinforce tonal paths, so, apart from the label between 23 and 32, harmonically I think what I tried to indicate is more logical.
Furthermore, what Faria indicates as a dominant pedal is still part of the first theme region; the modulating bridge truly begins at 28.
Nice idea with the litmus test, but why put a II56 of A+ at 22 without following up and cutting it "short"?
This doesn't convince me regarding your intervention, though it is beautiful.