I've searched for variations of terminology and have not found a post similar to what I'm about to ask - apologies if it has been covered already.  I've noticed that some CDLC has an inconsistent note highway speed.  It surges forward as the notes pass the strings.  The issue is intensified, in some cases, when lots of fretting is going on.  Other CDLC does not seem to have this issue and the original content also does not do this.  Is this just a result of poor authoring, or is there something