[PlanetCCRMA] Confusing Switch of MIDI ports In qjackctl from an ALSA port to a MIDI port

Brendan Jones brendan.jones.it at gmail.com
Wed Apr 11 09:48:42 PDT 2012

On 04/11/2012 06:21 PM, Sean Beeson wrote:
> Hi, List.
> Something changed in a new and an older Fedora 16(an upgrade prehaps)
> where the MIDI ports of software, particularly ZynAddSubFX, changed from
> being ALSA ports to being MIDI ports in qjackctl. I guess these is
> actually the spec for MIDI, but since USB MIDI interfaces show up as
> ALSA ports there is not way to connect MIDI hardware to these
> softsynths. I saw this kind of behavior before in some of the software
> under Fedora 14, but things had changed back to everything showing up as
> ALSA ports. It was my understanding that these decisions with ports are
> some thing that's decided at compile time for each piece of software. I
> could be wrong about that.
> I am able to easily change this or is there a work around? From what I'm
> seeing there is no way to connect my USB MIDI port that come in as ALSA
> ports to anything that shows up as a MIDI port. Why the variance for
> version to version and why the changed, as now, from how it worked in
> Fedora 16 two weeks ago and now?

You should install a2jmidi which maps your alsa midi ports to jack midi 
ports. a2jmidi -e will expose you hardware as ports also

> Thank you,
> Sean
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