11. Scripting Examples | Callback Handler

You can provide a custom handler that will receive callbacks from FMOD when certain events occur. To do this, create a class that inherits from FMODUnity.PlatformCallbackHandler:

using System;
using UnityEngine;

[CreateAssetMenu(menuName = "My FMOD Callback Handler")]
public class MyFMODCallbackHandler : FMODUnity.PlatformCallbackHandler {
    public override void PreInitialize(FMOD.Studio.System studioSystem, Action<FMOD.RESULT, string> reportResult)
    {
        FMOD.RESULT result;

        FMOD.System coreSystem;
        result = studioSystem.getCoreSystem(out coreSystem);
        reportResult(result, "studioSystem.getCoreSystem");

        // Set up studioSystem and coreSystem as desired
    }
}

Create a callback handler object:

Create Callback Handler

Set the Callback Handler field in the FMOD for Unity settings to your callback handler object:

Set Callback Handler

FMOD will now call the PreInitialize method on your object just before initializing the FMOD Studio system.