So, I have this patch working.
Everything is fine. Until I add the object in this second screenshot (timer/pulselength):
..and then get no audio output when the patch does Live.
Note the outlet of the added object isn't actually connected to anything. In fact, the same object, with nothing connected at all, causes the same issue, seemingly wherever it's placed.
There are no errors being flagged up in the Console.
a|x