On Tue, Apr 3, 2012 at 4:24 PM, Filipe Lopes <falktx(a)gmail.com> wrote: BTW, SpiralSynthModular is another program that uses JACK audio ports for CV. Seems perfectly reasonable to me, although I would rather it be the connection manager that disallows the connections rather than JACK itself. Some users may have valid reasons for wanting to force a connection between Audio and CV ports (such as sending an analog control voltage signal out of the audio interface)... And consider the case right now for programs which have not been updated to set the appropriate flag on their CV ports--those connections would have to be forced until the programs are updated. But even if the connection manager just used the information to display the ports in a different color, it would still be useful. Also, obviously you need a #define or something to indicate that the version of libjack has the enum for CV ports. As you point out, it's a very simple change and I think it's about time we had *something* in place for this and in lieu of arbitrary port types and data representations, this will certainly work for the CV case.