Well, you can export them easly using Unity Assets Bundle Extractor for Windows.
Custom MonoBehaviour types also are supported. Type information extracted from Unity is used in order to generate text representations of various asset types. Have you been looking a way to export music files from Unity 3D games but you couldn't find out? It can create standalone mod installers from changes to. As the files are copyrighted, do not distribute files illegally without proper permission from the owner.
In this case, I will show you how to extract songs from Santa Rockstar APK Use this for PERSONAL USE only. When you try to replace audio you might cause the game to crashed, honestly I have no idea how that could happened even if you follow the steps correctly but to solve this try to replace the dump text in another vanilla assetpackage. Important: This tutorial was made for Android games but it should work on ALL platforms And you're done, that's basically how to replace certain file using Unity Asset Bundle Extractor (UABE).