On Sat, Dec 12, 2015 at 9:57 AM, Filipe Coelho <falktx@gmail.com> wrote:

This is by using switch-master.
You can change your entire JACK setup on the fly, including the selected soundcard.

effectively, the instance is stopped and restarted. all ports and port connections go away, unless recreated by whatever does the restart.

If you keep the same jack settings but only change the sample rate you'll effectly change the jack sample-rate on the fly.
Note that JACK2 will call the buffersize and samplerate callbacks to inform clients of the change.
But yeah, since this was something that JACK was not designed for, *all* major clients that exist right now do not support this.

it wasn't just that it "wasn't designed for". we explicitly discussed it and decided that the mere possibility of a changing SR imposed too much of a burden on clients.

i still don't know, in retrospect, if this was a correct analysis.