AutoWah

AutoWah connects a Follower to a Filter. The frequency of the filter, follows the input amplitude curve. Inspiration from Tuna.js.


import { AutoWah, Synth } from "tone";
const autoWah = new AutoWah(50, 6, -30).toDestination();
// initialize the synth and connect to autowah
const synth = new Synth().connect(autoWah);
// Q value influences the effect of the wah - default is 2
autoWah.Q.value = 6;
// more audible on higher notes
synth.triggerAttackRelease("C4", "8n");

Hierarchy

Constructor

new AutoWah (
baseFrequency?:Frequency ,

The frequency the filter is set to at the low point of the wah

octaves?:Positive ,

The number of octaves above the baseFrequency the filter will sweep to when fully open.

sensitivity?:Decibels

The decibel threshold sensitivity for the incoming signal. Normal range of -40 to 0.

) => AutoWah
new AutoWah (
options?:Partial<AutoWahOptions >
) => AutoWah

Properties

baseFrequency #

Frequency

The base frequency from which the sweep will start from.

blockTime #

readonly Seconds

The number of seconds of 1 processing block (128 samples)

channelCount #

number

channelCount is the number of channels used when up-mixing and down-mixing connections to any inputs to the node. The default value is 2 except for specific nodes where its value is specially determined.

channelCountMode #

ChannelCountMode

channelCountMode determines how channels will be counted when up-mixing and down-mixing connections to any inputs to the node. The default value is "max". This attribute has no effect for nodes with no inputs.

  • "max" - computedNumberOfChannels is the maximum of the number of channels of all connections to an input. In this mode channelCount is ignored.
  • "clamped-max" - computedNumberOfChannels is determined as for "max" and then clamped to a maximum value of the given channelCount.
  • "explicit" - computedNumberOfChannels is the exact value as specified by the channelCount.

channelInterpretation #

ChannelInterpretation

channelInterpretation determines how individual channels will be treated when up-mixing and down-mixing connections to any inputs to the node. The default value is "speakers".

context #

BaseContext

The context belonging to the node.

debug #

boolean

Set this debug flag to log all events that happen in this class.

disposed #

readonly boolean

Indicates if the instance was disposed. 'Disposing' an instance means that all of the Web Audio nodes that were created for the instance are disconnected and freed for garbage collection.

follower #

Time

The follower's smoothing time

gain #

Signal<"decibels" >

The gain of the filter.

input #

Gain

The effect input node

name #

string

numberOfInputs #

readonly number

The number of inputs feeding into the AudioNode. For source nodes, this will be 0.

numberOfOutputs #

readonly number

The number of outputs of the AudioNode.

octaves #

number

The number of octaves that the filter will sweep above the baseFrequency.

output #

CrossFade

The effect output

Q #

Signal<"positive" >

The quality of the filter.

sampleTime #

readonly Seconds

The duration in seconds of one sample.

sensitivity #

Decibels

The sensitivity to control how responsive to the input signal the filter is.

static version #

string

The version number semver

wet #

Signal<"normalRange" >

The wet control is how much of the effected will pass through to the output. 1 = 100% effected signal, 0 = 100% dry signal.

Methods

chain #

Connect the output of this node to the rest of the nodes in series.


import { Destination, Filter, Oscillator, Volume } from "tone";
const osc = new Oscillator().start();
const filter = new Filter();
const volume = new Volume(-8);
// connect a node to the filter, volume and then to the master output
osc.chain(filter, volume, Destination);
chain (
...nodes:InputNode []
) => this

connect #

connect the output of a ToneAudioNode to an AudioParam, AudioNode, or ToneAudioNode

connect (
destination:InputNode ,

The output to connect to

outputNum= 0:number ,

The output to connect from

inputNum= 0:number

The input to connect to

) => this

disconnect #

disconnect the output

disconnect (
destination?:InputNode ,
outputNum= 0:number ,
inputNum= 0:number
) => this

dispose #

Dispose and disconnect

dispose ( ) => this

fan #

connect the output of this node to the rest of the nodes in parallel.

fan (
...nodes:InputNode []
) => this

get #

Get the object's attributes.


import { Oscillator } from "tone";
const osc = new Oscillator();
console.log(osc.get());
// returns {"type" : "sine", "frequency" : 440, ...etc}
get ( ) => AutoWahOptions

static getDefaults #

Returns all of the default options belonging to the class.

getDefaults ( ) => AutoWahOptions

immediate #

Return the current time of the Context clock without any lookAhead.

immediate ( ) => Seconds

now #

Return the current time of the Context clock plus the lookAhead.

now ( ) => Seconds

set #

Set multiple properties at once with an object.


import { Filter } from "tone";
const filter = new Filter();
// set values using an object
filter.set({
	frequency: 300,
	type: "highpass"
});
set ( ) => this

toDestination #

Connect the output to the context's destination node.

toDestination ( ) => this

toFrequency #

Convert the input to a frequency number

toFrequency (
freq:Frequency
) => Hertz

toMaster # DEPRECATED

Connect the output to the context's destination node. See toDestination

toMaster ( ) => this

toSeconds #

Convert the incoming time to seconds

toSeconds (
time?:Time
) => Seconds

toString #

Convert the class to a string


import { Oscillator } from "tone";
const osc = new Oscillator();
console.log(osc.toString());
toString ( ) => string

toTicks #

Convert the input time into ticks

toTicks (
time?:Time | TimeClass
) => Ticks