Wow, this is so great! You're a gifted writer, and I really love the fact that you took to heart your goal of constructing the entire symphony from the rising then falling motif. Brilliant execution of that. I admit I heard this when you first posted, but something this massive took a while with repeated listens to really figure out what I could even say, or what I even wanted to say haha.
This is just bloated with drama, and a great introduction of your symphonic prowess. I've noticed that no matter what I'm writing, part of who I am and what my personal situation is leaks out into the notes. I'm curious how personal this is to you, since it's your first symphony "no.1" (😛)? It sounds so emotional that I'd have a hard time believing it was all puzzle fitting and theory crafting.
I really enjoyed the overall arch of the dynamics. Even though it was slow, as you say, it had plenty of motion and variation within it that it wasn't a bother to me. But this kind of crescendo then diminuendo of the dynamics overall throughout it's duration was really cool, and helped make it cohesive as a one movement symphony.
The melodies are all superb, it's so rich in emotional depth to me. I love how you're a phenomenal string player, but you didn't make this about the violin. The tossing around of motifs and careful planning of color balance was a treat. I also can't thank you enough for hiding empty staves, it makes it so much easier to read and much more worth a composer peer's time.
I love this kind of discussion. THIS is what makes people better at composition.
There's no right or wrong here, just opinions from talented people. I agree with Peter in a way. I'm not sure if he meant a literal scherzando, but a change in texture would be advantageous, especially for a one movement symphony. Right at M, I love where you go here. But I think this would have been the perfect spot to build your motif in a faster rhythmic way. I love the heavy drama here, the light-heartedness might not fit. But I found myself continuing to relisten to this spot, where it builds really massively and then ends solemnly. I just kept zoning out, and I think it's because I was so used to the slower texture that my ears wanted a change rhythmically. If this was movement 1 of a multimovement work, I think it's more than fine as is. But as a one-movement symphony, it may have been something to consider deeper, and definitely for future thought.
Overall though, this piece of yours hits closer to my heart than you might know, as I'm almost done with a long symphonic work that's slower... and in the same key sig... and nearly as long...
But I digress. 😄 Lovely music, wonderfully clean score, and congratulations on completing your first symphony! I've listened to this numerous times now, and can say that I'll reference this when I have my own orchestration or notation questions. Extraordinarily beautiful composition 🙂