[sc-users] synthdef variant generation

[newton armstrong <newton@xxxxxxxxxxxxxxxxxxxxxxxx>]

this works fine:

(
var variants, synthdef;

variants = #[[0.2, 5, 0, 0], [0.2, 0.2, 0.1, 0]];

synthdef = SynthDef("foo", { |args=#[0.2, 5, 0, 0]|
	Out.ar(0, PitchShift.ar(SinOsc.ar(200), *args));
}).variants = ();

variants.do { |args, i| synthdef.variants[i] = [\args, args] };
synthdef.send(s);
)

Synth("foo.0");
Synth("foo.1");


but (for reasons that are not made apparent by the example i'm 
using...) i'd like to generate variants using a Control in the synthdef 
rather than an explicit argument:

(
var variants, synthdef;

variants = #[[0.2, 5, 0, 0], [0.2, 0.2, 0.1, 0]];

synthdef = SynthDef("foo", {
	var args;
	args = Control.names([\args]).ir(variants[0]);
	Out.ar(0, PitchShift.ar(SinOsc.ar(200), *args));
}).variants = ();

variants.do { |args, i| synthdef.variants[i] = [\args, args] };
synthdef.send(s);
)

but that breaks with this message: variant: "'foo.1' control: 'args' 
size mismatch." any ideas on how to make it work?