take the language's VM (or whatever) into the
synths' engine. Mostly
because adding and removing jack ports causes clicks, and that's not
acceptable.
Just a FYI/heads up: there is an alternate implementation of jackd
(jackdmp, where mp=multiprocessor) being worked on by stephane letz,
in which this does not happen. its an experiment at this point, but it
can run ardour and several other clients on OSX.
--p