internal AudioTrack Copy()
            {
                AudioTrack target = new AudioTrack();

                target.name      = name;
                target.mute      = mute;
                target.panBlend  = panBlend;
                target._sequence = _sequence;
                target.clips     = new List <BlendClip>();
                for (int i = 0; i < clips.Count; i++)
                {
                    target.AddClip(clips[i].Copy());
                    // target.clips[target.clips.Count - 1].Init(target, false, true);
                }
                return(target);
            }