[LAU] Inquiry regarding midi-filters

[Arnold Krille]

On Thursday 26 August 2010 22:37:05 Benoît Rouits wrote:
> Le jeudi 26 août 2010 à 21:23 +0200, Arnold Krille a écrit :
> > Hi all,
> > 
> > I do have a question for all the midi-freaks:
> > 
> > I have a korg nanokontrol and would like to use it to control a mixer
> > (behringer ddx, not my own). For faders this works quite well, for the
> > mute- buttons I am stumped:
> > The ddx wants ctrl 104 with the channel as value to mute and ctrl 105
> > with the channel to unmute.
> > The nanokontrol can only send one controller with two different values
> > per button.
> > 
> > So I thought about making the nanokontrol send the channel as controller
> > and 104 as value for mute 105 for unmute. And then use a midifilter to
> > switch ctrl- number and value before sending it to the ddx.
> > 
> > And this is where the fun begins.
> > 
> > midish is not able to do that (at least I couldn't make it work during
> > one evening).
> > qmidiroute is not able to do that (at least I couldn't make it work
> > during one evening).
> > puredata is not able to do this. While it is easy to connect ctlin with
> > ctlout and switch ctrl and value, it sometimes uses the value from the
> > event before and I couldn't get that to work either... (If some pd crack
> > can give me a hint, I am very open to that, the problem seems to be that
> > the events are passed/handled in the wrong order.)
> > 
> > Is there any other easy midi-router / -filter that even thinks about
> > these use cases? (Note: I didn't yet try pidim...)
> > 
> > Thanks for your answers,
> > 
> > Arnold
> 
> If the matter is to swap a controller parameter with its value,
> i can luckily code that now. Would the process be:
> 
> if (event_type == CONTROLLER) {
>  if (event_channel == channel_to_work_on) {
>   if (event_param == controller_to_work_on) {
>    swap = event_value;
>    event_value = event_param;
>    event_param = swap;
>   }
>  }
> }

Yes. And in which app/frame-work do I program that?

Note that I am very capable of writing the code myself, it just surprises me 
that many "flexible" midi-routers exist but none can fulfill these simple(?) 
task. Or in the case of pd can't fulfill it reliably.

I didn't think this task would require me to write my own midi-router. (Which 
I would probably name "yet another flexible midi router that is actually 
flexible" or yafmrtiaf.)

Have fun,

Arnold
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 198 bytes
Desc: This is a digitally signed message part.
URL: <http://lists.linuxaudio.org/pipermail/linux-audio-user/attachments/20100826/98a864b5/attachment.pgp>