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Re: [sc-users] [linux] Impulse question

My guess is that, even with an attack time of 0, the asr Env is still starting at 0 and muting the Impulse. 

Josh

On May 5, 2009, at 7:05 PM, Karsten Gebbert wrote:


I know this is only partly related, but I wonder why the folling
produces no sound, while it does when I set the \freq arg to > 0:

SynthDef(\single_impulse,{
	arg gate=1, amp=1, freq=0;
	var imp = Impulse.ar(freq);
imp = imp.dup * EnvGen.ar(Env.asr(0,1.0,0.1), gate:gate, levelScale:amp, doneAction:2); 
	Out.ar(0, LPF.ar(imp,7400))
}).play(s,[\freq,0])

How come the firts impulse gets swallowed by the filter?

Best,

Karsten

Fredrik Olofsson said :

hi,
(this question is so common it should go into the faq.)
the {}.play construction adds a short envelope and thereby takes out the initial impulse. use a synthdef or {Impulse.ar(1)}.play(fadeTime: 0) if 
you must.
_f

6 maj 2009 kl. 03.37 skrev Karsten Gebbert:


Hi All,

I found something strange which is at least to me quite
counterintuitive
and feels wrong:

	{ Impulse.ar(1) }.play

does not output the first impulse properly (or at all). Is this
intendet behaviour? Can others replicate that? I would expect the
behaviour to be that the first samples output by the ugen is the
impulse
so that:

	{ Impulse.ar(0) }.play
would output exactly one impulse and never progress any further. Am I 
wrong in my assumptions or is this a possible bug? I think at least
that
even when supplying a very low value like 0.00001 to the freq argument 
it should definitely output the first impulse no matter what, no?

I use 3.3 on Debian/Lenny.

Thanks to all,

karsten

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-- http://krgn.goto10.org



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