Re: [sc-dev] crossfading groups, noid for groups

["Ronald J. Kuivila" <rkuivila@xxxxxxxxxxxx>]

Hi James,

 I just downloaded your stuff and will take a look.  One little oddity:
the help file aliases break SC's compile if they are left in the class
library.  The OS will resolve the alias if it stays in the same folder but
loses it otherwise.

RJK

On Wed, 18 Jun 2003, James Harkins wrote:

> MixerChannel does this in a different way. It provides groups for
> playing things (synths and effects are kept in separate groups) and a
> fader/panner. Also pre and post-fader sends.
>
> http://swiki.hfbk-hamburg.de:8888/MusicTechnology/516
>
> Even though the class bundle is called "MixingBoard," you can use
> MixerChannels without the gui bits.
>
> James
>
> PS I need to update it today to use Balance2 for 2-in, 2-out channels
> rather than calculating it in math ugens.
>
> On Wednesday, Jun 18, 2003, at 10:53 US/Eastern, Ronald J. Kuivila
> wrote:
>
> >
> > Hi,
> >
> >  It occurs to me that Group's could be used directly to
> > provide crossfading similar to Julian's NodeProxy. Basically,
> > you fade out the group rather than individual members.
> >
> >  This involves overloading bus assignment with group membership, but
> > this
> > is already being done in a number of classes.  (I.e., a group has a
> > private bus its members output to and a public bus where the
> > accumulated
> > output is written by a separate synth immediately after the group.)
> >
> >  If this seems like a good idea, then the  message "noid" could be
> > extended to groups.  It would change the id's of all of its children.
> > Then on the client side, replacement nodes could be generated without
> > allocating new ID's.
> >
> >   Here is a crude example:
> >
> > SynthDef("fadeIn", { arg i_busOut=0, i_busIn=16, i_dur = 5;
> > 	Out.ar(i_busOut, Line.kr(0, 1, i_dur) * In.ar(i_busIn, 2))
> > }).writeDefFile;
> >
> > SynthDef("fadeOut", { arg i_busOut=0, i_busIn=16, i_dur = 5,
> > i_doneAction
> > = 3; var out;
> > out = K2A.ar(0);
> > Out.ar(i_busOut, Line.kr(1, 0, i_dur, doneAction: 3) * In.ar(i_busIn,
> > 2));
> > ReplaceOut.ar(i_busIn, [out,out]);
> > 	// clear busIn for duplicate group that is fading in
> > }).writeDefFile;
> >
> > s.boot;
> > r = RootNode(s);
> > b = Bus.audio(s, 2);
> >
> > g = Group.basicNew(s);
> > t = Synth.basicNew("fadeIn", s);
> > s.sendBundle(nil, g.addToTailMsg(r),
> > t.addAfterMsg(g,[\i_busIn,b.index])
> > );
> >
> > x = Patch({arg f= 400, a = -20; SinOsc.ar(f,0,a.dbamp) });
> > x.play(g,0,b);
> > // x.args.at(0).activeValue_(1000).changed;
> > // x.synth.set(\f,1000);
> >
> > u = Synth.basicNew("fadeOut", s);
> > h = Group.basicNew(s);
> > v = Synth.basicNew("fadeIn",h.server);
> >
> > s.sendBundle(nil,
> > 	[\n_set,x.synth.nodeID, \f,1000],
> > 	t.freeMsg,
> > 	u.addAfterMsg(g,[\i_busIn,b.index]),
> > 	h.addAfterMsg(u,[\i_busIn,b.index]),
> > 	v.addAfterMsg(h,[\i_busIn,b.index])
> >
> > );
> >
> > x.synth = nil;
> > // x.args.at(0).activeValue_(1000).changed;
> > x.play(h,0.1,b,400);
> >
> >
> >
> > _______________________________________________
> > sc-dev mailing list
> > sc-dev@xxxxxxxxxxxxxxx
> > http://www.create.ucsb.edu/mailman/listinfo/sc-dev
> >
> >
> ____________________________________
>
> H. James Harkins /// dewdrop_world
> http://www.duke.edu/~jharkins
>
> "WHAT'S WRONG WITH MURIEL PUCE?"
>
> SuperCollider Server codepool:
> http://swiki.hfbk-hamburg.de:8888/MusicTechnology/524
>
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