Oh, I love the "bumble bees crumble crusts
of pollen-ripened flowers". Such a vivid image! You must have observed the flowers full of pollens carefully.

But my question is how to understand ''the wall of music" correctly. Please help explain it!

Thank you for depicting such a beautiful garden in the noon --which remains me of an exiquiste Chinese silk thread embroidery pattern! (if you have seen that kind of embroidery. Yeah, looks very smooth and sheen)