Re: [sc-users] array dynamically in synthdef

[Guilherme Lunhani <gcravista@xxxxxxxxx>]

Hi, i'm trying to make an dynamic array after reading
this discussion...

I'm intented to make a dynamic synthesis with multitouch surface...

(

var baseFreq = 440;
var numberFingers = 10;

//generate Freqs
var harmGen = Array.fill(numberFingers, {arg i;
                            case
                            {i=0} {baseFreq*(i+1)}
                            {i>0} {baseFreq*((i+b.reciprocal).sqrt)};

                    });
                    
// generate amps -> (Array.series(10, 1, (-10*0.001))*10.reciprocal).sum
var ampGen = Array.series(numberFingers, 1, (-1*numberFingers*0.001))*numberFingers.reciprocal;

var phaseGen = Array.fill(numberFingers, 0.0);

SynthDef('dynKlangFinger', {
    var dynklang, harm, amp, phase;
    
    harm = \harm.kr(harmGen);
    amp = \amp.kr(ampGen);

    phase = \phase.kr(phaseGen);
    
    dynklang = DynKlang.ar(`[harm, amp, phase]);
    Out(0, dynklang);
    }).load(s);

)

but when i compile, not work (appears ERROR, CALL STACK, etc...)

I lost anything?

Best



Página pessoal:
http://gcravista.googlepages.com/guilhermemartinslunhanii

On Tue, Jul 28, 2009 at 9:37 AM, Josh Parmenter <josh@xxxxxxxxxxxxxxxxx> wrote:

all args to a SynthDef are actually converted into Controls for you. You just don't see it happen. :

SynthDef(\test1, {
       var freq;
       freq = Control.names(\freq).kr(440);
       ...
       })

is the same as:

SynthDef(\test1, {arg freq = 440;
       ...
       })

Josh

On Jul 28, 2009, at 8:12 AM, Andrew C. Smith wrote:

Yeah, Hjalte's email popped up just as I hit send.  I've got the
Control help file open right now.  Every time I think something can't
be done there's probably just a UGen I haven't heard of.

Questions about Control, though: could Control (or NamedControl) be
used instead of arg in all cases?  It seems that it supports defaults
and names.  The help file also has uses where a synth is initialized
using an arg and a Control with no difference between their syntax.
Thanks again.

Andrew

On Tue, Jul 28, 2009 at 10:48 AM, James Harkins<jamshark70@xxxxxxxxx> wrote:

On Tue, Jul 28, 2009 at 10:37 AM, Andrew C. Smith <acsmith@xxxxxxxxxxxxxx>
wrote:

I think that you can't pass arrays as arguments.

You can -- see Hjalte's email. For both of the "ok" synthdefs below, you can
send the array directly with set or new:

a = Synth(\ok, [x: [5, 6, 7, 8]]);
a.set(\x, { 10.rand } ! 4);

The issue with Perdo's latest try is that an array given as an argument
default must be a literal array. That is, this is OK:

SynthDef(\ok, { arg x = #[1, 2, 3, 4];
...
})

But this is not.

var default = [0, 1, 2, 3];
SynthDef(\no, { arg x = default;
...
});

And the solution as Hjalte said is to use Control, or (easier syntax)
NamedControl by way of Symbol:kr.

var default = [0, 1, 2, 3];
SynthDef(\alsoOK, {
   var    x = \x.kr(default);
   ...
})

hjh


--
James Harkins /// dewdrop world
jamshark70@xxxxxxxxxxxxxxxxx
http://www.dewdrop-world.net

"Come said the Muse,
Sing me a song no poet has yet chanted,
Sing me the universal."  -- Whitman

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