/usr/share/SuperCollider/HelpSource/Classes/GrainBuf.schelp is in supercollider-common 1:3.8.0~repack-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 | class:: GrainBuf
summary:: Granular synthesis with sound stored in a buffer
categories:: UGens>Buffer, UGens>Generators>Granular
related:: Classes/GrainIn, Classes/GrainFM, Classes/GrainSin
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:: sndbuf
the buffer holding a mono audio signal. If using multi-channel files, use Buffer.readChannel.
argument:: rate
the playback rate of the sampled sound
argument:: pos
the playback position for the grain to start with (0 is beginning, 1 is end of file)
argument:: interp
the interpolation method used for pitchshifting grains:
list::
## 1 = no interpolation
## 2 = linear
## 4 = cubic interpolation (more computationally intensive)
::
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, panning 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;
b = Buffer.read(s, Platform.resourceDir +/+ "sounds/a11wlk01-44_1.aiff");
// a custom envelope
winenv = Env([0, 1, 0], [0.5, 0.5], [8, -8]);
z = Buffer.sendCollection(s, winenv.discretize, 1);
SynthDef(\buf_grain_test, {arg gate = 1, amp = 1, sndbuf, envbuf;
var pan, env, freqdev;
// use mouse x to control panning
pan = MouseX.kr(-1, 1);
env = EnvGen.kr(
Env([0, 1, 0], [1, 1], \sin, 1),
gate,
levelScale: amp,
doneAction: 2);
Out.ar(0,
GrainBuf.ar(2, Impulse.kr(10), 0.1, sndbuf, LFNoise1.kr.range(0.5, 2),
LFNoise2.kr(0.1).range(0, 1), 2, pan, envbuf) * env)
}).add;
)
// use built-in env
x = Synth(\buf_grain_test, [\sndbuf, b, \envbuf, -1])
// switch to the custom env
x.set(\envbuf, z)
x.set(\envbuf, -1);
x.set(\gate, 0);
::
|