FMOD.Sound.getSubSound C# (CSharp) Method

        public RESULT getSubSound             (int index, out Sound subsound)
        {
            subsound = null;

            IntPtr subsoundraw;
            RESULT result = FMOD_Sound_GetSubSound(rawPtr, index, out subsoundraw);
            subsound = new Sound(subsoundraw);

            return result;
        }
        public RESULT getSubSoundParent(out Sound parentsound)

 public Sound?this[int index]
 {
     get
     {
         FMOD.Sound sound;
         if (!_fmodSound.getSubSound(index, out sound).Check(_suppressions))
         {
             return(null);
         }
         return(FromFmod(sound));
     }
 }