Gibber » Effects

Effects

BitCrush (Trunc)
Delay (Delay)
Distortion (Dist)
Low Pass Filter (LPF)
Ring Modulator (Ring)
Reverb (Reverb)

Effects can be added to any oscillator or synth. At this moment, all effects are inserts; I hope to add effects busses in the near future. Effects are stored in a JavaScript array, however, the array has some extra methods added to it that make it easier to manage the fx chain. Below is an example of adding / removing various effects:

    
          s = Synth();
seq = Seq(["A4", "D4", "E4", "B4"], _4);
seq.slave(s);
 
// add one or many fx at the same time
s.fx.add( Trunc(5) ); 
s.fx.add( Delay(_16), Reverb() );
 
// remove a named effect
s.fx.remove("Trunc");
 
// create an effect as a variable and insert at a certain position
r = Ring();
s.fx.insert(r, 0);
 
// remove fx at a certain position
s.fx.remove(0);
 
//remove all fx
s.fx.remove();

          view raw
          gibber_fx.js
          This Gist brought to you by GitHub.

A brief description of all effects is found below.

BitCrush

Parameters: bitResolution = 8, mix = 1

Usage: s.fx.add( Trunc(6) );

Truncates the bits of samples entering the effect. By default it will reduce samples to 8-bits and you will only hear the effect output.

Delay

Parameters: delayTime = _4, feedback = .3, mix = .3

Usage: s.fx.add( Delay(_8, .5) );

A simple echo effect. The delayTime controls the amount of time between each echo and is measured in samples; you can also use the various rhythmic variables (_4, _8, _16 etc.) Feedback determines how much of the delayed signal is fed back into the delay effect itself; this determines how many echoes you will hear.

Distortion

Parameters: gain = _4, masterVolume = 1

Usage: s.fx.add( Dist(8) );

This effect creates distortion modeled on the TubeScreamer stompbox.

Low Pass Filter

Parameters: cutoff = 300, resonance = 3

Usage: s.fx.add( LPF(440, 10) );

A low-pass filter with variable cutoff frequency and resonance.

Ring Modulator

Parameters: frequency = 440, amount = .15

Usage: s.fx.add( Ring(440, .25) );

Simple ring modulation using a sine wave oscillator to generate sum and difference sidebands.

Reverb

Parameters: roomSize = .8, damping = .3, wet = .75, dry = .5

Usage: s.fx.add( Reverb(.1, .1) );

Reverb based on the Freeverb algorithm. Damping attenuates high frequency content.