The connection between the ‘“1” message and the “line~” object had me stumped for a good while! I had assumed the object connected to the right inlet of the “line~” object, due to the vertical alignment of the two objects.
Reading the manual for line~ it’s clear why I was wrong, but i think the graphic could use an update to make that clear.
(Hint: i figured it out by highlighting the connection and seeing that it touched all the way to the left side in the pdf)
Just my thoughts! I love the book and am tearing through it.