I’ve made a patch to control ardour and jack directly from Pd. The patch
works through osc and [shell], and was made in jaunty. I didn’t test it on
macOs, but it should work, I think.
Just unpack the file somewhere (don’t loose the icon folder) and tell me
about it. Everything else should be clear in the patch.
Get the patch at http://lists.puredata.info/pipermail/pd-list/2010-02/075887.html (Pure data mailing list).