About CombN filter

[aksu]

Hi all

I was playing around a little with rdd’s code from this thread:

Ndef simple channel expansion question

In the Ndef graph below ‘s’ is stereo but ‘z’ is mono (Sc 3.11.2 & Sc 3.12.1): Ndef('o', { LFSaw.kr(#[8, 7.23], 0) * 3 + 80 }); Ndef('f', { LFSaw.kr(0.4, 0) * 24 + Ndef('o') }); Ndef('s', { SinOsc.ar(Ndef('f').midicps, 0) * 0.04 }); Ndef('z', { CombN.ar(Ndef('s'), 0.2, 0.2, 4) * 0.1 }); Ndef('z').play ['o','f','s','z'].collect({ arg item; Ndef(item).bus.numChannels }) == [2, 2, 2, 1] However if the CombN decaytime is set to [4, 4] (for instance) then ‘z’ is stereo as well. All of ‘o’ ‘f’ ‘s’…

I modified it like this:

(
{
	var o, f, s, snd;
	o = LFSaw.kr([8, 7.23, 8.29, 7.43], 0) * 3 + 80;
	f = LFSaw.kr(0.4, 0) * 24 + o;
	s = SinOsc.ar(f.midicps, 0) * 0.04;
	s = LeakDC.ar(s);
	snd = CombN.ar(s, 0.4, LFNoise2.ar(LFNoise2.ar(1).range(1,3)!4).range(0.01, 0.3), 4) * 0.1;

	snd = Splay.ar(snd);

	snd = SafetyLimiter.ar(snd);

}.play
)

Quite soon I receive:
CheckBadValues: NaN found in Synth 1008, ID 0 (previous 1013430 values were normal)
CheckBadValues: infinity found in Synth 1008, ID 0 (previous 1013430 values were normal)

Guess that’s expected. Is there anything one could to produce a sound like this without blowing things up?

Thanks.