A Spectrum curve prefab.Demo scene is included in the package, you can see functional prefab in it. This prefab is using UdonSharp so please import UdonSharp before importing this prefab, a tool developed by Merlin for C# coding within Udon: https://github.com/Merlin-san/UdonSharp You can find the prefab in this world: https://vrchat.com/home/launch?worldId=wrld_1ec7006b-43f0-4336-8619-fffab7a39129