Overview

These are nodes with generic effector functions that can be used with the Web Audio API.

These nodes can be created and connected in the same way as standard nodes defined by the specification of Web Audio API. The parameters of each node are similar to effector equipment, and you can also modulate it by connecting a signal here

Usage

• Load webaudio-macronodes.js in your HTML.

<script src="https://g200kg.github.io/webaudio-macronodes/webaudio-macronodes.js"></script>

• Use defined nodes in web-audio-api program (nodes should be created with constructor (not auciocontext factory method).

  • for Example :
    overdrive = new Macro_OverDriveNode(audioctx);

• For options, you can specify an object that defines the value of each parameter.
  For example, you can set arbitrary initial value by creating Macro_ToneControlNode as follows.

  • tone = new Macro_ToneControlNode(audioctx, {bass:3, mid:0, treble:-6});

• After node creation, you can use the node by connecting with the connect() method like ordinary nodes. AudioParam parameters can be controlled automation by automation functions such as setValueAtTime(), also signals from other nodes can be connected.

Example:

...
const tonecontrol = new Macro_ToneControlNode(audioctx, {bass:0, mid:0, treble:3});
sourceNode.connect(tonecontrol).connect(audioctx.destination);
...

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Macro_ToneControlNode

This is a node of equalizer function of general bass, mid tone, treble.

Constructor : new Macro_ToneControlNode(audioctx, options)

Parameter	Type	Range	Default	Description
bass	AudioParam	[-20..20]	0	gain (dB)
mid	AudioParam	[-20..20]	0	gain (dB)
treble	AudioParam	[-20..20]	0	gain (dB)
effect	boolean	true/false	true	effect / bypass

Functions

• getFrequencyResponse(freq, mag, phase)
  Get frequency response same as
  getFrequencyResponse() of BiquadFilterNode

sample test-tonecontrol.html

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Macro_GraphicEqNode

This is a node for 7 band graphic equalizer function. The eq parameter is an array of length 7 of AudioParam type.

Constructor : new Macro_GraphicEqNode(audioctx, options)

Parameter	Type	Range	Default	Description
eq[]	AudioParam[]	[-20..20]	0	gain (dB)
effect	boolean	true/false	true	effect / bypass

Functions

• getFrequencyResponse(freq, mag, phase)
  Get frequency response same as
  getFrequencyResponse() of BiquadFilterNode

sample test-graphiceq.html

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Macro_ChorusNode

This is the "chorus effect" node. This node gives a spread to the input sound.

Constructor : new Macro_ChorusNode(audioctx, options)

Parameter	Type	Range	Default	Description
rate	AudioParam	[0..10]	4	modulation speed (Hz)
depth	AudioParam	[0..1]	0.5	effect depth
effect	boolean	true/false	true	effect / bypass

sample test-chorus.html

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Macro_PhaserNode

Phaser effect. 4-stage phaser in the general explanation.

Constructor : new Macro_PhaserNode(audioctx, options)

Parameter	Type	Range	Default	Description
rate	AudioParam	[0..10]	4	modulation speed (Hz)
depth	AudioParam	[0..1]	0.5	effect depth
effect	boolean	true/false	true	effect / bypass

sample test-phaser.html

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Macro_DeepPhaserNode

6-stage phaser effect with resonace control.

Constructor : new Macro_DeepPhaserNode(audioctx, options)

Parameter	Type	Range	Default	Description
rate	AudioParam	[0..10]	4	modulation speed (Hz)
depth	AudioParam	[0..1]	0.5	effect depth
resonance	AudioParam	[0..1]	0.5	resonance
effect	boolean	true/false	true	effect / bypass

sample test-deepphaser.html

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Macro_DelayNode

Delay effect with feedback & mixing

Parameter	Type	Range	Default	Description
delayTime	AudioParam	[0..1]	0.5	delay time (sec)
feedback	AudioParam	[0..1]	0.5	feedback ratio
mix	AudioParam	[0..1]	0.5	wet mix level
effect	boolean	true/false	true	effect / bypass

sample test-delay.html

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Macro_PingPongDelayNode

Stereo pingpong delay effect. Delayed sound alternates from left and right channels

Constructor : new Macro_PingPongDelayNode(audioctx, options)

Parameter	Type	Range	Default	Description
delayTime	AudioParam	[0..1]	0.5	delay time (sec)
feedback	AudioParam	[0..1]	0.5	feedback ratio
mix	AudioParam	[0..1]	0.5	wet mix level
effect	boolean	true/false	true	effect / bypass

sample test-pingpongdelay.html

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Macro_BitCrusherNode

This is a bit crusher node. This node reduces the number of bits of the signal and creates a Lo-Fi sound.

Constructor : new Macro_BitCrusherNode(audioctx, options)

Parameter	Type	Range	Default	Description
bits	AudioParam	[1..8]	4	bits
effect	boolean	true/false	true	effect / bypass

sample test-bitcrusher.html

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Macro_OverDriveNode

This effect generates distortion by soft clipping of the input signal.

Constructor : new Macro_OverDriveNode(audioctx, options)

Parameter	Type	Range	Default	Description
drive	AudioParam	[0..1]	0.5	drive level
level	AudioParam	[0..1]	0.5	output level
effect	boolean	true/false	true	effect / bypass

sample test-overdrive.html

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Macro_FuzzNode

This effect generates distortion by soft clipping of the input signal.

Constructor : new Macro_OverDriveNode(audioctx, options)

Parameter	Type	Range	Default	Description
fuzz	AudioParam	[0..1]	0.5	drive level
level	AudioParam	[0..1]	0.5	output level
effect	boolean	true/false	true	effect / bypass

sample test-fuzz.html

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Macro_AutoWahNode

The center frequency of the filter moves according to the envelope of the input signal and creates wah effect.

Constructor : new Macro_AutoWahNode(audioctx, options)

Parameter	Type	Range	Default	Description
frequency	AudioParam	[100..6000]	300	base frequency (Hz)
Q	AudioParam	[0..10]	0.5	filter Q
sense	AudioParam	[0..6]	4	sweep width (octave)
effect	boolean	true/false	true	effect / bypass

sample test-autowah.html