[PlanetCCRMA] suggestions on getting parallel port MOTU MTPAV working in Fedora12?

[Niels Mayer]

On Sun, Feb 21, 2010 at 6:23 PM, Niels Mayer <nielsmayer at gmail.com> wrote:

> https://bugzilla.redhat.com/show_bug.cgi?id=566665
>

After investigating the recommendation from #alsa or #jack to not use '-X
seq' in Jack, and use a2jmidid... I've come to a preliminary conclusion that
was a spurious recommendation.

Are there bugs in the jack MIDI <-> alsa MIDI implementation in F12 that
would cause the issues I'm seeing with a parallel-port MIDI interface
(snd-mtpav)? MIDI works fine with a USB keyboard (Akai LPK 25).
Hooking up a real keyboard (Rol JP-8000, Yam Sy-77, Yam DD-55) with a real
MIDI plug is where I end up with trouble.

Seems like a2jmidid is needed only for jack users using FFADO; I'm using
ALSA driving a M-Audio Delta 66, which I got used on ebay specifically
because I wanted stable harware on Linux....
Hooking up this MTPAV has been frustrating enough that it looks like I'll be
needing a USB MIDI box too (e.g.
http://github.com/koppi/alsa-midi-latency-test/blob/master/benchmarks/um2ex.txtor
http://github.com/koppi/alsa-midi-latency-test/blob/master/benchmarks/midisport2x2ann.txt
 )

Is this a good summary of the Jack Midi vs Alsa Midi vs FFFADO situation, or
should I go ahead and waste time figuring out a2jmidid when qjackctl does
everything I need, beautifully.

http://www.pubbs.net/linuxaudio/200912/35701/

Re: LAU - routing jack-midi to alsa-midi? by james morris on
> 2009-12-15T02:13:53+00:00

>Setup > Settings tab, bottom left, where it says Midi driver.

>

>Another option for bridging Jack to Alsa midi or vice versa is a2jmidid,

>which can either run as daemon and bridge automatically, or let you

>start static bridges from the commandline on a needs basis.

>

>http://home.gna.org/a2jmidid/

If you're only connecting a small number of ports you could always use

the simple method of connecting the jack-midi port to jack-midi-through

which magically connects to alsa-midi-through which you then connect to

the alsa-midi-port.  (or am I missing something?)

.....

Re: LAU - routing jack-midi to alsa-midi? by Arnold Krille on
> 2009-12-15T08:07:52+00:00

...

Yes, you are both missing that the jack-midi-to-alsa-midi bridge is only

included in the alsa backend, not in the ffado (aka firewire) backend.

a2jmidid (or similar apps) are the only solution here.

Or just use jack-midi enabled apps:-)

Arnold

.......


Niels
http://nielsmayer.com
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