171 lines
3.7 KiB
Racket
171 lines
3.7 KiB
Racket
#lang scribble/manual
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@(require (for-label racket))
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@title{Harmonics}
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Convenient factory for filling buffers with harmonics on the server@section{categories}
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Collections, Server, UGens>Buffer
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@section{description}
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Harmonics objects are convenient factories for creating Arrays that are used to fill buffers using the b_gen sine fill commands on the server.
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@section{CLASSMETHODS}
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@section{method}
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new
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Create a new Harmonics array of size. Nothing is filled in for you, until instance methods are applied.
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@racketblock[
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a = Harmonics.new(16); // just returns an instance of Harmonics with size
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::
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]
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@section{INSTANCEMETHODS}
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@section{method}
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ramp
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@racketblock[
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a.ramp(1.0, 1.0); // returns a harmonic series
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b = Buffer.alloc(s, 512, 1);
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// harmonic series for freqs, ramp down for amps
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b.sine2(a.ramp(1.0, 1.0).postln, a.ramp(0.5, -0.025).postln, true, true, true);
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(
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z = SynthDef("help-Osc",{ arg out=0,bufnum=0;
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Out.ar(out,
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Osc.ar(bufnum, 200, 0, 0.5)
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)
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});
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)
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y = z.play(s,[\out, 0, \bufnum, b]);
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y.free;
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::
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]
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@section{method}
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decay
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Implements the formula: 1 / ((i+1) ** k)
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@racketblock[
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a.decay(1.0);
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b.sine2(a.ramp(1.0, 1.0).postln, a.decay(1.0).postln, true, true, true);
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y = z.play(s,[\out, 0, \bufnum, b]);
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y.free;
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::
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]
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@section{method}
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geom
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Implements the formula: 1 / (i ** k)
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@racketblock[
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a.geom(1.2);
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b.sine2(a.ramp(1.0, 1.0).postln, a.geom(1.2).postln, true, true, true);
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y = z.play(s,[\out, 0, \bufnum, b]);
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y.free;
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::
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]
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@section{method}
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formant
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Create a formant like structure.
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@racketblock[
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a.formant(6, 3);
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b.sine2(a.formant(12, 3).postln, a.geom(1.2), true, true, true);
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y = z.play(s,[\out, 0, \bufnum, b]);
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y.free;
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::
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]
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@section{method}
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teeth
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@racketblock[
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a.teeth(6, 3);
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b.sine2(a.teeth(2, 3).postln, a.geom(1.2), true, true, true);
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y = z.play(s,[\out, 0, \bufnum, b]);
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b.sine2(a.teeth(4, 1).postln, a.geom(1.2), true, true, true);
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b.sine2(a.teeth(1, 3).postln, a.geom(1.2), true, true, true);
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b.sine2(a.teeth(2, 3).postln, a.geom(1.2), true, true, true);
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y.free;
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::
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]
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@section{method}
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cutoff
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Returns 1.0 to the nth place, fills the rest with 0.0
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@racketblock[
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a.cutoff(3);
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b.sine2(a.ramp(1.0, 1.0), a.cutoff(3), true, true, true);
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y = z.play(s,[\out, 0, \bufnum, b]);
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b.sine2(a.ramp(1.0, 1.0), a.cutoff(3), true, true, true);
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b.sine2(a.ramp(1.0, 1.0), a.cutoff(5), true, true, true);
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b.sine2(a.ramp(1.0, 1.0), a.cutoff(1), true, true, true);
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y.free;
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::
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]
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@section{method}
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shelf
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@racketblock[
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a.shelf(0, 6, 1, 0);
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b.sine2(a.ramp(1.0, 1.0), a.shelf(0, 6, 1, 0).postln , true, true, true);
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y = z.play(s,[\out, 0, \bufnum, b]);
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b.sine2(a.ramp(1.0, 1.0), a.shelf(0, 11, 1, 0).postln , true, true, true);
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b.sine2(a.ramp(1.0, 1.0), a.shelf(2, 6, 1, 0).postln , true, true, true);
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b.sine2(a.ramp(1.0, 1.0), a.shelf(6, 8, 1, 0).postln , true, true, true);
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y.free;
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::
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]
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@section{method}
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sine
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@racketblock[
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a.sine(8, 0, 1, 0);
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b.sine2(a.ramp(1.0, 1.0), a.sine(8, 0, 1, 0).postln , true, true, true);
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y = z.play(s,[\out, 0, \bufnum, b]);
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b.sine2(a.ramp(1.0, 1.0), a.sine(4, 0, 1, 0).postln , true, true, true);
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b.sine2(a.ramp(1.0, 1.0), a.sine(2.2, 0.5pi, 0.4, 0.2).postln , true, true, true);
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b.sine2(a.ramp(1.0, 1.0), a.sine(pi, 0.25pi, 0.5, 0).postln , true, true, true);
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y.free;
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::
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]
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@section{method}
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pulse
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@racketblock[
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a.pulse(8, 0, 2, 1, 0);
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b.sine2(a.ramp(1.0, 1.0), a.pulse(8, 0, 2, 1, 0).postln , true, true, true);
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y = z.play(s,[\out, 0, \bufnum, b]);
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b.sine2(a.ramp(1.0, 1.0), a.pulse(8, 0, 2, 1, 0).postln , true, true, true);
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b.sine2(a.ramp(1.0, 1.0), a.pulse(4, 0, 2, 0.4, 0.2).postln , true, true, true);
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b.sine2(a.ramp(1.0, 1.0), a.pulse(7, 0.5pi, 3, 0.5, 0.1).postln , true, true, true);
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y.free;
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::
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]
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@section{method}
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rand, exprand, linrand
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@section{method}
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rand2
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@section{method}
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coin
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