98 lines
2.7 KiB
Text
98 lines
2.7 KiB
Text
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: Done.freeSelf);
|
|
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);
|
|
::
|
|
|