SuperCollider CLASSES (extension)

DNoiseRing
ExtensionExtension

Demand rate implementation of a Wiard noise ring
Inherits from: DUGen : UGen : AbstractFunction : Object

Description

Demand rate implementation of a Wiard noise ring.

In latter model synthesizers, digital noise sources began to appear in place of analog ones. Traditionally, a psuedo-random shift register set up for optimal length. By optimal length, it is meant that every state of all available bits will appear at some time, but the order is unknown. Essentially a counter that counts in an unknown order. This represents the maximum state of information "entropy" available for that number of bits. But music has close self-similarity over short periods of time. That is, it repeats itself with changes appearing slowly. This shift register generator is designed to give control of the rate of appearance of new information. It has a tight set of controls over how random it actually is and how fast change occurs.(text from http://mamonu.weebly.com/wiard-noisering.html)

Developed as part of the DEIND project.

Class Methods

*new (change: 0.5, chance: 0.5, shift: 1, numBits: 8, resetval: 0)

change = 0.5, chance = 0.5, shift = 1, numBits = 8, resetval = 0;

Arguments:

change

The higher change, the greater the chance for a new value

chance

The higher chance, the greater the chance the new value is HIGH

shift

not yet implemented.

numBits

not yet implemented.

resetval

Initial value

Returns:

A Demand rate UGen.

Inherited class methods

Instance Methods

Inherited instance methods

Examples

Plot

{
Demand.ar(Impulse.ar(1000), 0, DNoiseRing(change: 0.1, numBits: 32)) * (2**32).reciprocal
}.plot(1)

Plain 32bit value scaled to 0..1 and out of the speaker

{Demand.ar(Impulse.ar(10000), 0, DNoiseRing(change: MouseX.kr(0, 1), chance: 0.51, numBits: 32)) * (2**32).reciprocal}.play

As a sequencer

{
var freq = (Demand.ar(Impulse.ar(10), 0, DNoiseRing(change: MouseX.kr(0, 1), chance: MouseY.kr(0, 1), numBits: 32))).linlin(0, 2**32, 40, 40+48).midicps.poll;
    
    SinOsc.ar(freq)!2
}.play