I found out that I can do this in the course of a (longish) evening:
That’s a bobbin full of four-strand tram. I can do the tram much faster, because it’s twisted about five times per inch, instead of 20. This is going to be a soft, shiny yarn for embroidery.
It’s cool that you can see the difference in twist just from the sheen… the shiny one on top is the tram, five twists per inch; the one on the bottom is three-strand singles for organzine, at 20 twists per inch.