This video clip is a tiny excerpt from a TV program about an old Finnish
professional music engraver Mr. Yrjö Juustinen.
He was visiting the Department
of Statistics at the University of Helsinki to see how my program
was working on a drum plotter connected to a Wang 2200 minicomputer.
The TV program was produced by Anna-Kaarina Bentley in 1982
for the Finnish Broadcasting Company YLE.
In the program, slurs (connecting notes on the score and one appearing at the end of the clip) were drawn as generalized cycloids twice with different 'height' parameters thus making the curve thicker in the middle (according to unwritten rules of music engraving).