bluprint node for get frequency

I would like to take the frequency of an audio like the node “calculate frequency spectrum”
someone know a plug-in or tutorial C ++ to create a new bluprint node? I know they added On Audio Envelope Value but I would rather not have to update the project

p.s. it’s because I want package

By adding a new blueprint Node you mean creating a C++ function and expose it to blueprint? I’ve Seen a audio visualizer Plugin Open source in the Forums a year ago or Something, maybe it’s already There what you are looking for.

yes, I mean that

To Expose a function from c++ to blueprint it is basically https://www.tomlooman.com/ue4-ufunction-keywords-explained/
Because of the Plugin have a Look Audio Visualization Plugin 101 - Content Creation - Unreal Engine Forums
https://github.com/AndreaCatania/GoddessSoundVisualizer
- YouTube