The music of the Ainur

[spirit_of_fire]

When I was reading the Silmarillion for the second time, it suddenly struck that Tolkien did a pretty good job foreshadowing the events to come with his descriptions of the various themes of Eru, Melkor, and the Ainur.

Some parts I liked in particular:

When Iluvatar composed the second(?) theme that was the creation of the elves, it described the music as being full of sorrow and almost mournful (and later on the book described elves as deriving their chief beauty from their sorrow and the ever growing burden of the years).

When describing the third(?) theme(men), the music was described as the vain, endless braying of trumpets in what was almost a cacaphony, and though the theme did have a kind of rhythm of its own, it seemed that it took the most triumphant notes of the second theme(the elves) and wove it into its own. This might indicate the part the elf friends played in helping the elves stand firm against Morgoth, and maybe they "wove" some of the sorrow into their own theme too, think about Hurin and his sacrifice.

Anyone else see any new depth or interesting details in later reads?