.fork/argument question

[Mikelib]

Hi guys. I am reasonably new to Supercollider so go easy.
I created this piece of code earlier (modified from help file) and I can see what it is doing but can not understand why the argument is working as it does.
When the code is played it plays a sine 5 times in the sequence 2000hz, 2200,2400,2600,2800. As you can see the frequency on the Synth is set to 2000 + (a*200). Does this mean that the first time the routine happens 1 gets fed into the argument a? Then 2,3,4,5? Is the argument only working like this as it is part of a .do routine?

Any help appreciated.

(
SynthDef(\test,{arg freq = 10000;
Out.ar(1,SinOsc.ar(freq)) * (EnvGen.kr(Env.perc(0.01,0.04),doneAction:2))}).load(s);
)

(
{5.do{ arg a;
Synth(\test,[\freq, 2000 + (a*200)]);
1.0.wait
};d
}.fork;

)

[joshp]

Here is an easy way to test out what your code is doing (and may be helpful for future explorations):

5.do({arg a;
    "A is now ".post;
    a.postln;
    });

Notice that ONLY the values of 'a' will have the first part of the string printed... there is a '5' that will show up in the post window as well, but this is what the interpreter returns from the expression. .do returns its receiver, in this case, the integer 5.

Hope that helps.

Josh

[Mikelib]

Excellent. Much appreciated Josh!