Is there a way to "get" the weight value of a Local (Collider enabled) Post-Process Volume?

I would love to enable/disable an ambient sound effect as soon as the player enters on a collider’s area that’s also used for Non-Global Post-Process Volume, so… it would be lovely to know what weight value is this Component is using as weight value when the player approaches/enters on it’s collider area.

Is it possible? I’m currently doing this with a component by myself (checking the collider bounds mahself using a lazy Vec3 distance for weighting its sound volume, but getting the value used for the Local Post-Process Volume would help save some cpu, at least);

no way? It would be so cool to use it for playing ambient sounds…