public bool OnCollision(Fixture a, Fixture b, Contact contact)
        {
            if (isActivated && b.isPlayer == true && !b.IsSensor)
            {
                foreach (SoundObject so in this.list)
                {
                    if ((Sound2 is SoundObject))
                    {
                        SoundObject so2 = (SoundObject)Sound2;
                        if (so2.volume < so.volume)
                        {
                            so.Crossfade(so2, _Channel2Gain, _Channel1Loss, _fadeTime);
                        }
                        else
                        {
                            so2.Crossfade(so, _Channel2Gain, _Channel1Loss, _fadeTime);
                        }
                    }
                }
                isActivated = false;
                return(true);
            }


            else
            {
                return(false);
            }
        }