Creating a "feature" to customise sound environment

[74HC14]

I'd like to cause heavier wind sound effects to play when the player is in open air at high altitude, or near a cliff at high altitude. The "feature" page on the wiki suggests the mod has the capability for this, but the wiki page is blank, and the config file has no mention of altitude/Y-level/height, nor of features. Is this something I can edit via the config file? Or will I have to unzip the mod and rifle through its json files to make myself a datapack via trial and error?