Correção de frase: ''Quando ouvem teu canto, cada anjo...''

Hello!

I'm translating a poem to English and I'm not sure about how to write a sentence correctly.

The sentence is: "Quando ouvem teu canto, cada anjo de pedra move suas asas... Etc"

I wrote: "When they hear your song, every stone angel moves its wings..."

Are the bold words used correctly? If not, how should it be?

Thanks!