SuperCollider CLASSES

Harmonics

Convenient factory for filling buffers with harmonics on the server
Inherits from: Object

Description

Harmonics objects are convenient factories for creating Arrays that are used to fill buffers using the b_gen sine fill commands on the server.

Class Methods

*new (size: 32)

Create a new Harmonics array of size. Nothing is filled in for you, until instance methods are applied.

a = Harmonics.new(16);    // just returns an instance of Harmonics with size

Inherited class methods

Instance Methods

-ramp (start: 1, step)

a.ramp(1.0, 1.0);    // returns a harmonic series

b = Buffer.alloc(s, 512, 1);
// harmonic series for freqs, ramp down for amps
b.sine2(a.ramp(1.0, 1.0).postln, a.ramp(0.5, -0.025).postln, true, true, true);
(
z = SynthDef("help-Osc",{ arg out=0,bufnum=0;
    Out.ar(out,
        Osc.ar(bufnum, 200, 0, 0.5)
    )
});
)
y = z.play(s,[\out, 0, \bufnum, b]);
y.free;

-decay (k: 1)

Implements the formula: 1 / ((i+1) ** k)

a.decay(1.0);

b.sine2(a.ramp(1.0, 1.0).postln, a.decay(1.0).postln, true, true, true);
y = z.play(s,[\out, 0, \bufnum, b]);
y.free;

-geom (k: 1.2)

Implements the formula: 1 / (i ** k)

a.geom(1.2);

b.sine2(a.ramp(1.0, 1.0).postln, a.geom(1.2).postln, true, true, true);
y = z.play(s,[\out, 0, \bufnum, b]);
y.free;

-formant (center: 12, width: 3)

Create a formant like structure.

a.formant(6, 3);

b.sine2(a.formant(12, 3).postln, a.geom(1.2), true, true, true);
y = z.play(s,[\out, 0, \bufnum, b]);
y.free;

-teeth (spacing: 2, start: 0)

a.teeth(6, 3);

b.sine2(a.teeth(2, 3).postln, a.geom(1.2), true, true, true);
y = z.play(s,[\out, 0, \bufnum, b]);
b.sine2(a.teeth(4, 1).postln, a.geom(1.2), true, true, true);
b.sine2(a.teeth(1, 3).postln, a.geom(1.2), true, true, true);
b.sine2(a.teeth(2, 3).postln, a.geom(1.2), true, true, true);
y.free;

-cutoff (n)

Returns 1.0 to the nth place, fills the rest with 0.0

a.cutoff(3);

b.sine2(a.ramp(1.0, 1.0), a.cutoff(3), true, true, true);
y = z.play(s,[\out, 0, \bufnum, b]);
b.sine2(a.ramp(1.0, 1.0), a.cutoff(3), true, true, true);
b.sine2(a.ramp(1.0, 1.0), a.cutoff(5), true, true, true);
b.sine2(a.ramp(1.0, 1.0), a.cutoff(1), true, true, true);
y.free;

-shelf (start, end, startLevel: 1, endLevel: 0)

a.shelf(0, 6, 1, 0);

b.sine2(a.ramp(1.0, 1.0), a.shelf(0, 6, 1, 0).postln , true, true, true);
y = z.play(s,[\out, 0, \bufnum, b]);
b.sine2(a.ramp(1.0, 1.0), a.shelf(0, 11, 1, 0).postln , true, true, true);
b.sine2(a.ramp(1.0, 1.0), a.shelf(2, 6, 1, 0).postln , true, true, true);
b.sine2(a.ramp(1.0, 1.0), a.shelf(6, 8, 1, 0).postln , true, true, true);
y.free;

-sine (wavelength: 4, iphase: 1.5707963267949, mul: 1, add: 0)

a.sine(8, 0, 1, 0);

b.sine2(a.ramp(1.0, 1.0), a.sine(8, 0, 1, 0).postln , true, true, true);
y = z.play(s,[\out, 0, \bufnum, b]);
b.sine2(a.ramp(1.0, 1.0), a.sine(4, 0, 1, 0).postln , true, true, true);
b.sine2(a.ramp(1.0, 1.0), a.sine(2.2, 0.5pi, 0.4, 0.2).postln , true, true, true);
b.sine2(a.ramp(1.0, 1.0), a.sine(pi, 0.25pi, 0.5, 0).postln , true, true, true);
y.free;

-pulse (wavelength: 4, iphase: 0, duty: 0.5, mul: 1, add: 0)

a.pulse(8, 0, 2, 1, 0);

b.sine2(a.ramp(1.0, 1.0), a.pulse(8, 0, 2, 1, 0).postln , true, true, true);
y = z.play(s,[\out, 0, \bufnum, b]);
b.sine2(a.ramp(1.0, 1.0), a.pulse(8, 0, 2, 1, 0).postln , true, true, true);
b.sine2(a.ramp(1.0, 1.0), a.pulse(4, 0, 2, 0.4, 0.2).postln , true, true, true);
b.sine2(a.ramp(1.0, 1.0), a.pulse(7, 0.5pi, 3, 0.5, 0.1).postln , true, true, true);
y.free;

-rand (lo: 0, hi: 1)

-exprand (lo: 0.01, hi: 1)

-linrand (lo: 0, hi: 1)

-rand2 (val: 1)

-coin (prob: 0.5)

Inherited instance methods

Undocumented instance methods

-size

-size = value