FMOD.Studio.EventInstance.getParameterValue C# (CSharp) Method

        public RESULT getParameterValue(string name, out float value)
        {
            return FMOD_Studio_EventInstance_GetParameterValue(rawPtr, Encoding.UTF8.GetBytes(name + Char.MinValue), out value);
        }
        public RESULT setParameterValue(string name, float value)

    public void SetInnerBGM()
    {
        // wtf????
        float value      = 0;
        float finalValue = 0;

        bgmInstance.getParameterValue(LEVEL_OUTER_BGM_PARAS, out value, out finalValue);

        Services.taskManager
        .Do(new FmodInstanceTask(bgmInstance, LEVEL_OUTER_BGM_PARAS, value, 0, 1));
    }