>> So, just to be clear, are you actually saying that PD's audio
>> internals *are* multi-threaded?
> The audio thread is created implicitly by the audio backend. Typically,
> there is only a single audio callback and thus only a single "audio thread"
> per application.
So that's one. where am I getting the other three threads from? Or is this a case of "it depends on the library?" Because I can live with that, I guess. It doesn't explain the problems that I am having with JACK, but it changes the scope of my inquiry, and that is enough.