Re: [fluid-dev] Query: router_chan

[Dave Serls]

On Sat, 5 Mar 2011 21:09:18 +0100
"Pedro Lopez-Cabanillas" <address@hidden> wrote:

> On Saturday 05 March 2011, Dave Serls wrote:
> > On Thu, 3 Mar 2011 10:09:54 -0700
> > Dave Serls <address@hidden> wrote:
> > 
> > > 
> > >  Returning to linux audio after a long hiatus.
> > > 
> > >  If I use router_chan in a fluidsynth instance like this:
> > > 
> > > # change note events for odd channels to ridiculous invalid channel
> > > # note that channel nums are 0-relative in fluidsynth 1-relative on piano
> > > router_begin note
> > > router_chan 1  0 8 32
> > > router_chan 3  0 8 32
> > > router_chan 5  0 8 32
> > > router_chan 7  0 8 32
> > > router_chan 9  0 8 32
> > > router_chan 11 0 8 32
> > > router_chan 13 0 8 32
> > > router_chan 15 0 8 32
> > > router_end
> > > 
> > >  I receive no errors.  But what really happens? It sounds pretty much OK.
> > > 
> > >  The code only checks the resulting channel for less than 0, setting it 
> > > to 0 if so.
> > >  If the channel has no preset -- does the event disappear?
> > >  This is what I want, as I'm running 2 instances of fluidsynth, one 
> > > translating the even channels high,
> > >  the other the odd ones.
> > >  My Yamaha has a 'split' keyboard function which will send the left hand 
> > > to a channel 'paired' with
> > >  the right hand on another adjacent even or odd channel.
> > > 
> >   I will shamelessly reply to myself.
> >   'router_chan 1 1 8 32' and lines for each odd/even channel will work. 
> >   Except for keyboard channels 1 and 2 which do not participate for some 
> > reason.
> >   Warning messages are emitted from 
> >   fluidsynth: warning: Channel out of range
> >   for each noteon for a channel from the 'wrong' instance.
> >   Is there anyway of forcing a NULL preset to a channel?
> 
> This feature was introduced in FS 1.1.1 as a new API function
> http://fluidsynth.sourceforge.net/api/index.html#NewIn1_1_1
>  
> The CLI program doesn't use it yet, as there is not any command for it. 
> QSynth OTOH uses it in the channel view, context menu (RMB). The presets for 
> all channels can be saved with a given name on disk.
> 
> >   Will that suppress the warnings?
> >   Has anyone ever used the channel routing feature?
> 
> The MIDI router shouldn't be used for this.
> 
> Regards,
> Pedro

  Thank you, Pedro.
  Yes, the router should not be used for this.
  From poking around, I did discover issuing the 'prog xx 128'
  will result in channel 'xx' having no preset.
> 
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