An example sentence would be:
There is some music that is the ____ equivalent of poetry to me.
It's not quite "musical" since I want the word to be more closely related to sound whereas music is a kind of sound. I thought of "sonorous," given its Latin root, but the definition of that is "(of a person's voice or other sound) imposingly deep and full" and I'm looking for a word that is more neutral. I also thought of "phonetic" but that is more closely related to speech.