These are the sorts of things that would be vastly better done in video, whereby dynamic graphings respond to the sounds being adjusted.

And it's very well scripted, by the best writer and thinker on the subject of explaining and demonstrating FM. It seems a great shame that Yamaha hasn't bothered to create a budget for this fine man of words and sounds to work with a video producer to make an excellent set of videos, especially during this time.

Odd, actually.