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Re: [sc-users] Re: sc-users Digest, Vol 4, Issue 59

On Sat, 27 Dec 2003, Umiachi wrote:


 I'm nowhere near a mac for the next few days, why
 wouldn't a freq of zero work (i.e. what happened)?


actually it looks like it does work.  I was using 0.midicps which doesn't
equal zero hertz.  zero hertz doesn't seem to give any output, as
expected.
zero hertz you do not hear but it might have effects on the output, also you waste cpu cycles for silence. 

try the attached class (InstrSpawner2)


(
	Instr.new(\pulseSynth, {arg fundFreq, int1, int2, pulseWidth,
cutoff;
		var p, out;

		p = Pulse.ar([fundFreq * int1.midiratio, fundFreq,
fundFreq*int2.midiratio],
			pulseWidth, 0.3);

		out = LPF.ar(Mix.ar(p), cutoff)
			* EnvGen.ar(Env.perc, doneAction:2);

		[out, out];
	});
)

InstrSpawner2(\pulseSynth, [
	Pseq(#[0, 20, 20, \, 120, \, \, 20].midicps, inf),
	0.25, -0.25, 0.25, 5000
	], 0.5).play;
(it costs some more cycles too - a rest is a valid desire, on the other hand and it is much cheaper than 0 hertz or 0 amplitude) 




here's the code anyway, in case someone wants a drum synthesizer to screw
around with (i think it's based on somebody's helpfile). 
(
	Instr.new(\pulseSynth, {arg fundFreq, int1, int2, pulseWidth,
cutoff;
		var p, out;

		p = Pulse.ar([fundFreq * int1.midiratio, fundFreq,
fundFreq*int2.midiratio],
			pulseWidth, 0.3);

		out = LPF.ar(Mix.ar(p), cutoff)
			* EnvGen.ar(Env.perc, doneAction:2);

		[out, out];
	});
)

InstrSpawner(\pulseSynth, [Pseq(#[0, 20, 20, 20, 120, 20, 20, 20].midicps,
inf), 0.25, -0.25, 0.25, 5000], 0.5).play;

                             David Loehlin
dloehlin@xxxxxxxxxxxx 
	                 Anticlimax radio:
		       whpk 88.5fm chicago
	 	   fridays eight to ten am
        http://home.uchicago.edu/~dloehlin


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