+trigger, Re: [linux-audio-dev] ladspa.h.diff

[Tim Goetze]

[Jesse Chappell]

>Dave Robillard wrote on Fri, 05-Mar-2004:
>
> > On Fri, 2004-03-05 at 13:10, Steve Harris wrote:
> > > On Fri, Mar 05, 2004 at 05:54:52PM +0100, Tim Goetze wrote:
> > > > [Taybin Rutkin]
> > > >
> > > > >TRIGGER, or MOMENTARY in my patch
> > > > >(http://www.mail-archive.com/linux-audio-dev@music.columbia.edu/msg11074.html),
> > > > >should really be 804, because it implies TOGGLED.
> > > >
> > > > yes, i thought about this, but came to the conclusion that
> > > > variable-amplitude triggers are useful to have.
> > >
> > > Momentary controls are boolean by definition.
> >
> > Variable-amplitude triggers would be really cool though.  You could,
> > say, make a synthed snare generator plugin that is velocity-sensitive.
> >
> > Actually, something like that would be out of the LADSPA domain I
> > suppose.  An idea anyway.
>
>You just use a regular control port to specify
>your threshold/amplitude.  The trigger port just does the "triggering".

the proposed patch fits this model well: a plugin need only specify
TOGGLED in addition to TRIGGER.

at the same time, connecting a 'velocity'-enhanced trigger source to a
port defining TRIGGER without TOGGLED is possible with the minimum
need of transmission logic (conditionals, ports) in the host as well
as in the plugin.

amicalement,

tim