162 lines
2.7 KiB
Racket
162 lines
2.7 KiB
Racket
#lang scribble/manual
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@(require (for-label racket))
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@title{OscN}
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Noninterpolating wavetable oscillator.@section{related}
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Classes/COsc, Classes/Osc, Classes/VOsc, Classes/VOsc3
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@section{categories}
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UGens>Generators>Deterministic
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@section{description}
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Noninterpolating wavetable lookup oscillator with frequency and phase
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modulation inputs. It is usually better to use the interpolating
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oscillator link::Classes/Osc:: .
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@section{classmethods}
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@section{method}
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ar, kr
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@section{argument}
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bufnum
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Buffer index. the buffer size must be a power of 2.
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The buffer should NOT be filled using Wavetable format (b_gen
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commands should set wavetable flag to false. Raw signals (not
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converted with asWavetable) can be saved to disk and loaded
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into the buffer.
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@section{argument}
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freq
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Frequency in Hertz.
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@section{argument}
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phase
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Phase offset or modulator in radians.
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@section{argument}
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mul
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Output will be multiplied by this value.
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@section{argument}
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add
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This value will be added to the output.
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@section{Examples}
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@racketblock[
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// compare examples below with interpolating Osc examples.
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(
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s = Server.local;
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b = Buffer.alloc(s,512,1);
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b.sine1(1.0/[1,2,3,4,5,6],true,false,true);
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SynthDef("help-OscN",{ arg out=0,bufnum=0;
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Out.ar(out,
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OscN.ar(bufnum, 500, 0, 0.5)
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)
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}).play(s,[0,0,1,b.bufnum]);
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)
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b.free;
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(
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// noninterpolating - there are noticeable artifacts
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// modulate freq
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s = Server.local;
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b = Buffer.alloc(s,512,1);
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b.sine1(1.0/[1,2,3,4,5,6].squared,true,false,true);
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SynthDef("help-OscN",{ arg out=0,bufnum=0;
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Out.ar(out,
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OscN.ar(bufnum, XLine.kr(2000,200), 0, 0.5)
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)
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}).play(s,[\out,0,\bufnum,b.bufnum]);
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)
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b.free;
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(
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// sounds very different than the Osc example
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s = Server.local;
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b = Buffer.alloc(s, 512, 1);
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b.sine1([1.0], true, true, true);
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SynthDef("help-OscN",{ arg out=0,bufnum=0;
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Out.ar(out,
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OscN.ar(bufnum,
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OscN.ar(bufnum,
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XLine.kr(1,1000,9),
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0,
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200,
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800),
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0,
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0.25)
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)
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}).play(s,[\out, 0, \bufnum, b.bufnum]);
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)
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b.free;
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(
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// modulate phase
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s = Server.local;
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b = Buffer.alloc(s, 512, 1);
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b.sine1([1.0], true, true, true);
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SynthDef("help-OscN",{ arg out=0,bufnum=0;
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Out.ar(out,
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OscN.ar(bufnum,
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800,
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OscN.ar(bufnum,
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XLine.kr(20,8000,10),
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0,
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2pi),
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0.25)
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)
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}).play(s,[\out, 0, \bufnum, b.bufnum]);
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)
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b.free;
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(
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// change the buffer while its playing
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s = Server.local;
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b = Buffer.alloc(s, 4096, 1);
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b.sine1(1.0/[1,2,3,4,5,6], true, true, true);
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SynthDef("help-OscN",{ arg out=0,bufnum=0;
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Out.ar(out,
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OscN.ar(bufnum, [80,80.2], 0, 0.2)
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)
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}).play(s,[\out, 0, \bufnum, b.bufnum]);
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)
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(
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Routine({
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var n = 32;
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50.do({
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b.sine1(Array.rand(n,0,1).cubed, true, true, true);
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0.25.wait;
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});
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}).play;
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)
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b.free;
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::
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]
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