Re: [Denemo-devel] Newbie getting MIDI K/B to work with ALSA and qjackctl

[Edgar Aichinger]

Am Sonntag, 19. Januar 2014, 14:08:26 schrieb Philip Rhoades:

> This is what I have in Edit-Preferences-Audio/MIDI - seemingly no matter 
> what I do:
> 
>    Audio Backend
>      PortAudio
>      JACK
>      none
> 
>    Output Device
>      Lots of ALSA devices
> 
> the third panel has:
> 
>    MIDI Backend
>      ALSA
>      JACK
>      none
> 
> - can you tell me what you see in your setup?

The same. My build supports portaudio, but not portmidi, because of the bug i 
referred to in my previous post. I tried to come up with a quick solution 
yesterday, but failed, and won't have much time next week to look at it again, 
sorry.

For me choosing either ALSA or JACK as MIDI Backend just works. For JACK the 
jackd server has to be running of course...

Choosing the backend and pressing OK immediately creates the respective denemo 
port, so it become visible in e.g. qjackctl in the ALSA resp. MIDI tab (right 
panel), and I can connect my keyboard (left panel) to it.

To use JACK MIDI properly you have to start the a2jmidid daemon or use the -X 
seq commandline option (MIDI driver config option in qjackctl) to jackd, both 
methods will forward ALSA MIDI ports to the JACK MIDI system. JACK MIDI itself 
doesn't create hardware ports, so you need that to see your MIDI keyboard in 
qjackctl's MIDI tab. a2jmidid is preferred over -X seq because it supplies 
better MIDI timing.
> 
> Thanks,
> 
> Phil.
> 

Edgar