TGrains | SuperCollider 3.12.2 Help

Description

Triggers generate grains from a buffer. Each grain has a Hanning envelope(sin2(x) for x from 0 to π)

and can be panned over multichannel output.

Class Methods

TGrains.ar(numChannels, trigger: 0, bufnum: 0, rate: 1, centerPos: 0, dur: 0.1, pan: 0, amp: 0.1, interp: 4)

Arguments:

numChannels	The number of output channels.
trigger	At each trigger, the following arguments are sampled and used as the arguments of a new grain. A trigger occurs when a signal changes from non-positive to a positive value. If the trigger is audio rate then the grains will start with sample accuracy.
bufnum	The index of the buffer to use. It must be a one channel (mono) buffer.
rate	1.0 is normal, 2.0 is one octave up, 0.5 is one octave down -1.0 is backward normal rate… etc.
centerPos	The position in the buffer in seconds at which the grain envelope will reach maximum amplitude.
dur	Duration of the grain in seconds.
pan	determines where to pan the output. If numChannels = 1, the pan argument is ignored. If numChannels = 2, panning is similar to Pan2. If numChannels > 2, panning is the same as PanAz.
amp	Amplitude of the grain.
interp	1, 2, or 4. Determines whether the grain uses (1) no interpolation, (2) linear interpolation, or (4) cubic interpolation.

Examples

s.boot;
b = Buffer.read(s, Platform.resourceDir +/+ "sounds/a11wlk01.wav");

(
{
    var trate, dur, rate;
    trate = MouseY.kr(2,200,1);
    dur = 4 / trate;
    rate = Dseq([10, 1, 1, 0.5, 0.5, 0.2, 0.1], inf);
    TGrains.ar(2, Impulse.ar(trate), b, rate, MouseX.kr(0,BufDur.kr(b)), dur, Dseq([-1, 1], inf), 0.1, 2);
}.scope(zoom: 4);
)

(
{
    var trate, dur, clk, pos, pan;
    trate = MouseY.kr(8,120,1);
    dur = 12 / trate;
    clk = Impulse.kr(trate);
    pos = MouseX.kr(0,BufDur.kr(b)) + TRand.kr(0, 0.01, clk);
    pan = WhiteNoise.kr(0.6);
    TGrains.ar(2, clk, b, 1, pos, dur, pan, 0.1);
}.scope(zoom: 4);
)

// 4 channels
(
{
    var trate, dur, clk, pos, pan;
    trate = MouseY.kr(8,120,1);
    dur = 12 / trate;
    clk = Impulse.kr(trate);
    pos = MouseX.kr(0,BufDur.kr(b)) + TRand.kr(0, 0.01, clk);
    pan = WhiteNoise.kr(0.6);
    TGrains.ar(4, clk, b, 1, pos, dur, pan, 0.1);
}.scope(4, zoom: 4);
)

(
{
    var trate, dur, clk, pos, pan;
    trate = MouseY.kr(8,120,1);
    dur = 4 / trate;
    clk = Dust.kr(trate);
    pos = MouseX.kr(0,BufDur.kr(b)) + TRand.kr(0, 0.01, clk);
    pan = WhiteNoise.kr(0.6);
    TGrains.ar(2, clk, b, 1, pos, dur, pan, 0.1);
}.scope(zoom: 4);
)

(
{
    var trate, dur, clk, pos, pan;
    trate = LinExp.kr(LFTri.kr(MouseY.kr(0.1,2,1)),-1,1,8,120);
    dur = 12 / trate;
    clk = Impulse.ar(trate);
    pos = MouseX.kr(0,BufDur.kr(b));
    pan = WhiteNoise.kr(0.6);
    TGrains.ar(2, clk, b, 1, pos, dur, pan, 0.1);
}.scope(zoom: 4);
)

(
{
    var trate, dur, clk, pos, pan;
    trate = 12;
    dur = MouseY.kr(0.2,24,1) / trate;
    clk = Impulse.kr(trate);
    pos = MouseX.kr(0,BufDur.kr(b)) + TRand.kr(0, 0.01, clk);
    pan = WhiteNoise.kr(0.6);
    TGrains.ar(2, clk, b, 1, pos, dur, pan, 0.1);
}.scope(zoom: 4);
)

(
{
    var trate, dur, clk, pos, pan;
    trate = 100;
    dur = 8 / trate;
    clk = Impulse.kr(trate);
    pos = Integrator.kr(BrownNoise.kr(0.001));
    pan = WhiteNoise.kr(0.6);
    TGrains.ar(2, clk, b, 1, pos, dur, pan, 0.1);
}.scope(zoom: 4);
)

(
{
    var trate, dur, clk, pos, pan;
    trate = MouseY.kr(1,400,1);
    dur = 8 / trate;
    clk = Impulse.kr(trate);
    pos = MouseX.kr(0,BufDur.kr(b));
    pan = WhiteNoise.kr(0.8);
    TGrains.ar(2, clk, b, 2 ** WhiteNoise.kr(2), pos, dur, pan, 0.1);
}.scope(zoom: 4);
)

(
{
    var trate, dur;
    trate = MouseY.kr(2,120,1);
    dur = 1.2 / trate;
    TGrains.ar(2, Impulse.ar(trate), b, (1.2 ** WhiteNoise.kr(3).round(1)), MouseX.kr(0,BufDur.kr(b)), dur, WhiteNoise.kr(0.6), 0.1);
}.scope(zoom: 4);
)

// demand ugens as inputs
(
{
    var trate, dur, z, d;
    trate = MouseX.kr(1, 100, 1);
    d = { Dwhite(0.1, 0.2, 1) };
    z = {
        Drand([Dgeom(0.1, 1 + d.value, Diwhite(20, 40)), Dgeom(1, 1 - d.value, Diwhite(20, 40))])
    };
    TGrains.ar(2,
        Impulse.ar(trate),
        bufnum: 10,
        rate: Dseq([1, 1, z.value, 0.5, 0.5, 0.2, 0.1, 0.1, 0.1, 0.1], inf) * 2 + 1,
        centerPos: Dseq(z.dup(8), inf),
        dur: Dseq([1, d.value, 1, z.value, 0.5, 0.5, 0.1, z.value] * 2, inf) / trate,
        pan: Dseq([1, 1, 1, 0.5, 0.2, 0.1, 0, 0, 0], inf) * 2 - 1,
        amp: Dseq([1, 0, z.value, 0, 2, 1.0, 1, 0.1, 0.1], inf)
    );
}.scope(zoom: 4);
)

b.free

helpfile source: /usr/local/share/SuperCollider/HelpSource/Classes/TGrains.schelp
link::Classes/TGrains::

TGrains : MultiOutUGen : UGen : AbstractFunction : Object

Description

Class Methods

TGrains.ar(numChannels, trigger: 0, bufnum: 0, rate: 1, centerPos: 0, dur: 0.1, pan: 0, amp: 0.1, interp: 4)

Arguments:

Inherited class methods

Instance Methods

Inherited instance methods

Examples