On Fri, Sep 26, 2014 at 11:12 AM, Philipp Überbacher <murks@tuxfamily.org> wrote:

Alles klar. Well, mostly. I guess that alsa_midi only makes sense
when alsa is used as a backend, so I don't quite see why it is a server
option instead of a backend option.

No, this is what is so lovely about it. You can now use a FFADO backend *and* -X alsa_midi and get full bridging to ALSA MIDI just as you would do with a2jmidid. This was impossible with the old backend-based "seq" and "raw" options. This lets you interface with ALSA-only MIDI apps even when using FFADO or other JACK backends such as netjack.