rsc3/doc-schelp/HelpSource/Classes/GrainSin.schelp

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2022-08-24 13:53:18 +00:00
class:: GrainSin
summary:: Granular synthesis with sine tones
categories:: UGens>Generators>Granular
related:: Classes/GrainIn, Classes/GrainFM, Classes/GrainBuf
classmethods::
private:: categories
method:: ar
argument:: numChannels
the number of channels to output. If 1, mono is returned and pan is ignored.
argument:: trigger
a kr or ar trigger to start a new grain. If ar, grains after the start of the synth are sample accurate.
argument:: dur
size of the grain (in seconds).
argument:: freq
the input to granulate
argument:: pan
determines where to pan the output.
list::
## If numChannels = 1, no panning is done.
## If numChannels = 2, panning is similar to Pan2.
## If numChannels > 2, pannins is the same as PanAz.
::
argument:: envbufnum
the buffer number containing a signal to use for the grain envelope. -1 uses a built-in Hann envelope.
argument:: maxGrains
the maximum number of overlapping grains that can be used at a given time. This value is set at the UGens init time and can't be modified. Defaults to 512. This can be set lower for more efficient use of memory.
warning:: The above parameter is new (post SC 3.3.1) and has the potential to break code written <= 3.3.1. This parameter is BEFORE the mul slot, and you may need to update code to account for this difference. ::
argument:: mul
argument:: add
discussion:: All args except numChannels and trigger are polled at grain creation time.
instancemethods::
private:: init, argNamesInputsOffset
Examples::
code::
s.boot;
(
var winenv;
// a custom envelope
winenv = Env([0, 1, 0], [0.5, 0.5], [8, -8]);
z = Buffer.sendCollection(s, winenv.discretize, 1);
SynthDef(\sin_grain_test, {arg gate = 1, amp = 1, envbuf;
var pan, env, freqdev;
// use mouse x to control panning
pan = MouseX.kr(-1, 1);
// use WhiteNoise and mouse y to control deviation from center pitch
freqdev = WhiteNoise.kr(MouseY.kr(0, 400));
env = EnvGen.kr(
Env([0, 1, 0], [1, 1], \sin, 1),
gate,
levelScale: amp,
doneAction: Done.freeSelf);
Out.ar(0,
GrainSin.ar(2, Impulse.kr(10), 0.1, 440 + freqdev, pan, envbuf) * env)
}).add;
)
s.scope
// use built-in env
x = Synth(\sin_grain_test, [\envbuf, -1])
// switch to the custom env
x.set(\envbuf, z)
x.set(\envbuf, -1);
x.set(\gate, 0);
::