[Len Ovens]
While I don't doubt the calculations could be done
in that time, I assumed
they would still have to use the same size buffering as jack, so even if
it was all done internal to one effect there would still be at least
2.67ms in the example above. 2.6ms each if they each hit jack in between.
TBH, I have used my netbook as a guitar effect with 128f/p and no
noticable delay.
If you're not doing anything funky (and you'd have to go out of your
way to), multiple jack clients can indeed process the signal without
adding any latency. Marvellous, isn't it?
Tim