Hi Guix, while packaging Extempora I noticed that the portaudio does not seem to work with JACK. Extempora uses portaudio and it would not create a JACK port. After I rebuilt portaudio with “jack-1” rather than “jack-2” Extempora would create a JACK port via portaudio successfully. “jack-1” had to be modified to propagate “bdb” because the libjack headers include it. Attached are these two patches. In general I would suggest only to use “jack-1” as an input. “jack-2” is a different implementation, but it does not replace “jack-1”. For a user it may make sense to install “jack-2” because of DBus support, but for libraries it should not be needed. ~~ Ricardo