[PlanetCCRMA] Qjackctl question

Martin Tarenskeen m.tarenskeen at zonnet.nl
Sat May 16 13:13:18 PDT 2009

On Sat, May 16, 2009 at 10:35:13AM -0700, Len wrote:
> Normally when I run qjackctl, there are 3 tabs at the top of the Connections window:  'Audio' 'MIDI' 'ALSA'
> Typically, any MIDI clients appear only under the ALSA tab.  However, I just installed LV2/SLV2 and zynjacku, and 
> some LV2 synth plugins (Calf, zynadd), but the zynjacku client shows up under the MIDI tab in jack Connections.  So 
> the writable clients/input ports for zynjacku are under one tab (MIDI), while my readable clients/output ports are 
> under another tab (ALSA), and there doesn't seem to be any way to connect them.  Is there some way I can configure 
> jack (or lv2) so that MIDI clients are handled the same way (either as MIDI or ALSA midi, but not both)?
> Thanks in advance,
> Len

This puzzled me too for quite some hours. I finally got for example zynadd working 
with vkeybd like this:

1. In qjackctl I had to select the Jack MIDI driver (seq) in the Setup. Stop and 
restart qjackctl.
2. I start vkeybd and zynjacku+zynadd
3. In qjackctl, Audio tab, I connect the audio from "zynjacku" to "system"
4. MIDI tab: connect "system" to "zynjacku"
5. ALSA tab: connect "Virtual Keyboard" to "Midi Through"

Et voila, I can do my first test playing zynadd sounds with vkeybd.

This is just an example of course. I don't know why something simple has to be 
made so complicated, so don't ask me. Maybe someone else can explain more ?



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