Class: Oscillator

Defined in: packages/core/src/oscillator.ts:137

Synthesizer that generates audio from oscillator waveforms.

Oscillator creates sound from scratch using sine, square, sawtooth, or triangle waves. Supports ADSR envelopes for professional-quality synthesis, filters for tone shaping, and all the gain/pan controls from BaseSound.

Unlike Sound which plays pre-recorded audio, Oscillator generates audio in real-time. Oscillators have infinite duration and must be explicitly stopped.

Example

typescript

import { createOscillator } from 'ez-web-audio'

// Simple sine wave at 440Hz (A4)
const synth = await createOscillator({ frequency: 440, type: 'sine' })
synth.play()
setTimeout(() => synth.stop(), 500)

// With ADSR envelope for piano-like decay
const piano = await createOscillator({
  frequency: 440,
  type: 'triangle',
  envelope: { attack: 0.01, decay: 0.1, sustain: 0.7, release: 0.3 }
})
piano.play()
setTimeout(() => piano.stop(), 500) // Release phase plays after stop

// With lowpass filter
const muted = await createOscillator({
  frequency: 440,
  type: 'sawtooth',
  lowpass: { frequency: 800, q: 1 }
})
muted.play()

Extends

BaseSound

Constructors

Constructor

new Oscillator(audioContext, options?): Oscillator

Defined in: packages/core/src/oscillator.ts:184

Create an Oscillator instance.

Note: Use createOscillator factory function instead of calling this directly.

Parameters

audioContext

AudioContext

The AudioContext to use for audio operations

options?

OscillatorOptions

Oscillator configuration (frequency, type, filters, envelope)

Returns

Oscillator

Overrides

BaseSound.constructor

Properties

_analyzer

protected _analyzer: Analyzer | null = null

Defined in: packages/core/src/base-sound.ts:161

Inherited from

SampledNote._analyzer

_destination

protected _destination: AudioNode

Defined in: packages/core/src/base-sound.ts:154

Inherited from

SampledNote._destination

_isPlaying

protected _isPlaying: boolean = false

Defined in: packages/core/src/base-sound.ts:84

Inherited from

SampledNote._isPlaying

_targetGain

protected _targetGain: number = 1

Defined in: packages/core/src/base-sound.ts:107

The user's intended gain level (0–1). Tracks the last value set via changeGainTo() / volume setter so that gain can be restored after a fadeOut() or Oscillator anti-click stop that ramps gainNode.gain to 0.

Inherited from

SampledNote._targetGain

audioContext

readonly audioContext: AudioContext

Defined in: packages/core/src/base-sound.ts:218

Inherited from

SampledNote.audioContext

audioSourceNode

audioSourceNode: OscillatorNode

Defined in: packages/core/src/oscillator.ts:139

The underlying OscillatorNode that generates the audio signal.

Overrides

BaseSound.audioSourceNode

clearTimeout()

protected clearTimeout: (id) => void

Defined in: packages/core/src/base-sound.ts:97

Parameters

id

number

Returns

void

Inherited from

BaseSound.clearTimeout

controller

protected controller: OscillatorController

Defined in: packages/core/src/oscillator.ts:151

Controller for managing gain, pan, frequency, and detune parameters.

Overrides

BaseSound.controller

debug?

optional debug: boolean

Defined in: packages/core/src/base-sound.ts:216

Default

undefined (follows global debug mode)

Example

sound.debug = true  // enable debug for this sound
sound.debug = false // silence this sound even when global debug is on

Inherited from

SampledNote.debug

effectChainInput

protected effectChainInput: GainNode

Defined in: packages/core/src/base-sound.ts:147

Inherited from

SampledNote.effectChainInput

effects

protected effects: Effect[] = []

Defined in: packages/core/src/base-sound.ts:140

Inherited from

SampledNote.effects

freq

protected freq: number

Defined in: packages/core/src/oscillator.ts:148

Base frequency in Hz.

gainNode

protected gainNode: GainNode

Defined in: packages/core/src/base-sound.ts:93

The GainNode controlling this sound's volume.

For simple volume control, use changeGainTo() or update('gain'). For advanced routing, use getGainNode().

Inherited from

SampledNote.gainNode

name

name: string

Defined in: packages/core/src/base-sound.ts:202

Inherited from

Sound.name

pannerNode

protected pannerNode: StereoPannerNode

Defined in: packages/core/src/base-sound.ts:95

Inherited from

SampledNote.pannerNode

setTimeout()

protected setTimeout: (fn, delayMillis) => number

Defined in: packages/core/src/base-sound.ts:96

Parameters

fn

() => void

delayMillis

number

Returns

number

Inherited from

BaseSound.setTimeout

startedPlayingAt

protected startedPlayingAt: number = 0

Defined in: packages/core/src/base-sound.ts:99

Inherited from

SampledNote.startedPlayingAt

startOffset

protected startOffset: number = 0

Defined in: packages/core/src/base-sound.ts:170

Offset in seconds from the beginning of the audio buffer where playback starts. Used internally by Track for seek/resume functionality.

Default

See

https://developer.mozilla.org/en-US/docs/Web/API/AudioScheduledSourceNode/start

Inherited from

SampledNote.startOffset

Accessors

_isLooping

Get Signature

get protected _isLooping(): boolean

Defined in: packages/core/src/base-sound.ts:1183

Protected getter for looping state. Override in subclasses that support looping. Used by playAt() to skip the duration timeout when looping is active.

Returns

boolean

Inherited from

BaseSound._isLooping

disposed

Get Signature

get disposed(): boolean

Defined in: packages/core/src/base-sound.ts:1174

Whether this instance has been disposed.

Once disposed, the instance cannot be used for playback. Create a new instance if you need to play the sound again.

Example

typescript

sound.dispose()
console.log(sound.disposed) // true

Returns

boolean

Inherited from

SampledNote.disposed

duration

Get Signature

get duration(): TimeObject

Defined in: packages/core/src/oscillator.ts:543

Get the duration of the oscillator.

Oscillators have no inherent duration - they play indefinitely until stopped. Returns Infinity to indicate continuous playback, distinguishing from finite Sound/Track durations.

Example

typescript

const osc = await createOscillator({ frequency: 440 })
console.log(osc.duration.raw) // Infinity

// Oscillators must be explicitly stopped
osc.play()
setTimeout(() => osc.stop(), 1000)

Returns

TimeObject

Overrides

BaseSound.duration

durationRaw

Get Signature

get durationRaw(): number

Defined in: packages/core/src/oscillator.ts:522

Get the duration in seconds without allocating a TimeObject. Oscillators have infinite duration.

Returns

number

Overrides

BaseSound.durationRaw

isPlaying

Get Signature

get isPlaying(): boolean

Defined in: packages/core/src/base-sound.ts:1115

Whether the sound is currently playing.

Example

typescript

if (sound.isPlaying) {
  await sound.stop()
}

Returns

boolean

Inherited from

SampledNote.isPlaying

percentGain

Get Signature

get percentGain(): number

Defined in: packages/core/src/base-sound.ts:1127

Current gain as a percentage (0-100).

Example

typescript

console.log(`Volume: ${sound.percentGain}%`) // "Volume: 50%"

Returns

number

Inherited from

SampledNote.percentGain

volume

Get Signature

get volume(): number

Defined in: packages/core/src/base-sound.ts:1150

Alias for gain. Get/set the volume (0 = silent, 1 = full volume).

Values above 1 amplify the signal and may cause distortion. The setter delegates to changeGainTo(), which throws if the value is negative and warns if it exceeds 1.

Inherited by Sound, Track, and Oscillator.

Example

typescript

sound.volume = 0.5  // set to half volume
console.log(sound.volume) // 0.5

// Works on all BaseSound subclasses
const osc = await createOscillator()
osc.volume = 0.8

Returns

number

Set Signature

set volume(value): void

Defined in: packages/core/src/base-sound.ts:1154

Parameters

value

number

Returns

void

Inherited from

BaseSound.volume

Methods

_clearListeners()

protected _clearListeners(): void

Defined in: packages/core/src/events/typed-event-emitter.ts:192

Remove every listener registered through this emitter (via addEventListener(), on(), or once()), regardless of how many or what event type they're bound to.

Native EventTarget has no removeAllListeners(). This works around that by aborting a shared AbortSignal threaded through every addEventListener() call this class makes, then swapping in a fresh AbortController so the instance can keep accepting new listeners afterward (e.g. if it's reused before being garbage collected).

Subclasses call this from their dispose() alongside neutering dispatchEvent — the neuter stops future emits, this stops stale listener closures from being retained/invoked at all.

Returns

void

Inherited from

BaseSound._clearListeners

_onPlaybackStarted()

protected _onPlaybackStarted(): void

Defined in: packages/core/src/base-sound.ts:1000

Hook method called after playback starts. Override in subclasses to add behavior that runs for all play variants.

Returns

void

Inherited from

BaseSound._onPlaybackStarted

addEffect()

addEffect(effect, position?): this

Defined in: packages/core/src/base-sound.ts:401

Add an effect to the effect chain. Effects persist across multiple play() calls.

Parameters

effect

Effect

The Effect instance to add

position?

number

Optional index to insert at (defaults to end of chain)

Returns

this

this for chaining

Example

const filter = createFilterEffect('lowpass', { frequency: 1000 })
sound.addEffect(filter)

Inherited from

BaseSound.addEffect

addEffects()

addEffects(effects, position?): this

Defined in: packages/core/src/base-sound.ts:471

Add multiple effects to the effect chain in one call. The chain is rewired only once after all effects are added, which is more efficient than calling addEffect() multiple times.

Parameters

effects

Effect[]

Array of Effect instances to add

position?

number

Optional index to insert at (defaults to end of chain)

Returns

this

this for chaining

Example

typescript

const filter = createFilterEffect('lowpass', { frequency: 800 })
const boost = createGainEffect(1.5)
sound.addEffects([filter, boost])

Inherited from

BaseSound.addEffects

addEventListener()

Call Signature

addEventListener<K>(type, listener, options?): void

Defined in: packages/core/src/events/typed-event-emitter.ts:44

Add a typed event listener for known event types. Overloaded to provide type safety for known event types while remaining compatible with the native EventTarget API.

Type Parameters

K

K extends "play" | "dispose" | "stop" | "end"

Parameters

type

K

The event type (key of TMap)

listener

(event) => void

Typed event handler

options?

Standard addEventListener options

boolean | AddEventListenerOptions

Returns

void

Inherited from

BaseSound.addEventListener

Call Signature

addEventListener(type, listener, options?): void

Defined in: packages/core/src/events/typed-event-emitter.ts:49

Add a typed event listener for known event types. Overloaded to provide type safety for known event types while remaining compatible with the native EventTarget API.

Parameters

type

string

The event type (key of TMap)

listener

Typed event handler

EventListenerOrEventListenerObject | null

options?

Standard addEventListener options

boolean | AddEventListenerOptions

Returns

void

Inherited from

BaseSound.addEventListener

changeGainTo()

changeGainTo(value): this

Defined in: packages/core/src/base-sound.ts:693

Set the gain (volume) immediately.

Convenience method for update('gain').to(value).as('ratio').

Parameters

value

number

Gain from 0 (silent) to 1 (full volume)

Returns

this

this for chaining

Example

typescript

sound.changeGainTo(0.5)  // Half volume
sound.changeGainTo(0)    // Muted
sound.changeGainTo(1)    // Full volume

Inherited from

BaseSound.changeGainTo

changePanTo()

changePanTo(value): this

Defined in: packages/core/src/base-sound.ts:670

Set the pan position immediately.

Convenience method for update('pan').to(value).as('ratio').

Parameters

value

number

Pan position from -1 (left) to 1 (right), 0 is center

Returns

this

this for chaining

Example

typescript

sound.changePanTo(-1)  // Hard left
sound.changePanTo(0)   // Center
sound.changePanTo(1)   // Hard right

Inherited from

BaseSound.changePanTo

dispose()

dispose(): void

Defined in: packages/core/src/base-sound.ts:1270

Dispose this sound instance, releasing all audio resources.

Disconnects all audio nodes, clears the effect chain, cancels pending timeouts, and marks the instance as unusable. After disposing, calling play() will throw an error.

Dispose is idempotent — calling it multiple times is safe.

After disposal, event listeners registered via on() / addEventListener() will no longer fire. To free listener references for garbage collection, call off() for each listener before calling dispose().

Returns

void

Example

typescript

const sound = await createSound('click.mp3')
await sound.play()

// When done with the sound
sound.dispose()
console.log(sound.disposed) // true

// Attempting to play after dispose will throw
// sound.play() // throws Error: Cannot play a disposed sound

Inherited from

BaseSound.dispose

emit()

protected emit<K>(type, detail): void

Defined in: packages/core/src/events/typed-event-emitter.ts:95

Emit a typed event with the given detail.

Creates a CustomEvent with the provided detail and dispatches it on this target. Subclasses call this internally to fire lifecycle events.

Type Parameters

K

K extends "play" | "dispose" | "stop" | "end"

Parameters

type

K

The event type to emit (key of TMap)

detail

BaseSoundEventMap[K]["detail"]

The event detail object (typed by TMap)

Returns

void

Inherited from

BaseSound.emit

fadeIn()

fadeIn(duration): Promise<void>

Defined in: packages/core/src/base-sound.ts:1202

Fade in the sound from silence to its current gain over duration seconds, then play.

Schedules a gain ramp from 0 to the current gain value and calls play(). The current gain is restored after playback — use changeGainTo() to set a target volume before calling fadeIn().

Parameters

duration

number

Fade-in duration in seconds

Returns

Promise<void>

Promise that resolves when playback begins

Example

typescript

const sound = await createSound('music.mp3')
await sound.fadeIn(2) // fade in over 2 seconds

Inherited from

BaseSound.fadeIn

fadeOut()

fadeOut(duration): Promise<void>

Defined in: packages/core/src/base-sound.ts:1225

Fade out the sound from its current gain to silence over duration seconds, then stop.

If the sound is not playing, this is a no-op. Returns a Promise that resolves after the fade completes and stop() has been called.

Parameters

duration

number

Fade-out duration in seconds

Returns

Promise<void>

Promise that resolves when the fade and stop are complete

Example

typescript

const sound = await createSound('music.mp3')
await sound.play()
await sound.fadeOut(2) // fade out over 2 seconds then stop

Inherited from

BaseSound.fadeOut

getAnalyzer()

getAnalyzer(): Analyzer | null

Defined in: packages/core/src/base-sound.ts:578

Get the currently attached analyzer, if any.

Returns

Analyzer | null

The attached Analyzer instance, or null if none attached

Inherited from

BaseSound.getAnalyzer

getEffects()

getEffects(): readonly Effect[]

Defined in: packages/core/src/base-sound.ts:514

Get a readonly copy of the current effects array.

Returns

readonly Effect[]

Shallow copy of the effects array

Inherited from

BaseSound.getEffects

getFilters()

getFilters(): readonly BiquadFilterNode[]

Defined in: packages/core/src/oscillator.ts:514

Get a readonly snapshot of the oscillator's filter nodes.

Returns a shallow copy of the internal filters array so callers can inspect filter state (type, frequency, Q) without mutating the chain.

Returns

readonly BiquadFilterNode[]

Readonly array of BiquadFilterNode instances

Example

typescript

const osc = await createOscillator({
  frequency: 440,
  lowpass: { frequency: 800, q: 1 },
  highpass: { frequency: 200 }
})
const filters = osc.getFilters()
console.log(filters.length) // 2
console.log(filters[0].type) // 'highpass'

getGainNode()

getGainNode(): GainNode

Defined in: packages/core/src/base-sound.ts:597

Get the GainNode for this sound.

Provides controlled access to the underlying GainNode for advanced audio routing scenarios (e.g., crossfading between tracks). For simple volume control, use changeGainTo() or update('gain').

Returns

GainNode

The GainNode controlling this sound's volume

Example

typescript

const node = sound.getGainNode()
node.gain.linearRampToValueAtTime(0, ctx.currentTime + 2)

Inherited from

BaseSound.getGainNode

getPannerNode()

getPannerNode(): StereoPannerNode

Defined in: packages/core/src/base-sound.ts:610

Get the StereoPannerNode for this sound.

Provides controlled access to the underlying StereoPannerNode for advanced audio routing scenarios (e.g., LFO modulation of pan position). For simple pan control, use changePanTo() or update('pan').

Returns

StereoPannerNode

The StereoPannerNode controlling this sound's pan position

Inherited from

BaseSound.getPannerNode

later()

protected later(fn): void

Defined in: packages/core/src/base-sound.ts:1158

Parameters

fn

() => void

Returns

void

Inherited from

BaseSound.later

off()

off<K>(type, listener): this

Defined in: packages/core/src/events/typed-event-emitter.ts:167

Unsubscribe from an event.

Note: Due to native EventTarget limitations, you must provide the same listener function reference that was used when subscribing.

Type Parameters

K

K extends "play" | "dispose" | "stop" | "end"

Parameters

type

K

The event type to unsubscribe from

listener

(event) => void

The event handler function to remove

Returns

this

this for chaining

Example

typescript

const handler = (e) => console.log(e.detail)
emitter.on('play', handler)
// later...
emitter.off('play', handler)

Inherited from

BaseSound.off

on()

on<K>(type, listener): this

Defined in: packages/core/src/events/typed-event-emitter.ts:116

Subscribe to one or more events. Supports chaining.

Type Parameters

K

K extends "play" | "dispose" | "stop" | "end"

Parameters

type

The event type(s) to subscribe to (key or array of keys of TMap)

K | K[]

listener

(event) => void

The event handler function

Returns

this

this for chaining

Example

typescript

emitter.on('play', handlePlay).on('stop', handleStop)
emitter.on(['play', 'stop'], handleBoth)

Inherited from

BaseSound.on

once()

once<K>(type, listener): this

Defined in: packages/core/src/events/typed-event-emitter.ts:141

Subscribe to an event once. Handler is removed after first invocation.

Type Parameters

K

K extends "play" | "dispose" | "stop" | "end"

Parameters

type

K

The event type to subscribe to

listener

(event) => void

The event handler function

Returns

this

this for chaining

Example

typescript

emitter.once('end', () => console.log('Finished'))

Inherited from

BaseSound.once

onPlayRamp()

onPlayRamp(type, rampType?): object

Defined in: packages/core/src/oscillator.ts:311

Schedule a parameter ramp when play() is called.

Parameters

type

ControlType

The parameter to ramp ('gain', 'pan', 'frequency', 'detune')

rampType?

RampType

Type of ramp curve ('linear' or 'exponential')

Returns

object

Fluent builder for setting start value, end value, and duration

from()

from: (startValue) => object

Parameters

startValue

number

Returns

object

to()

to: (endValue) => object

Parameters

endValue

number

Returns

object

in()

in: (endTime) => void

Parameters

endTime

number

Returns

void

Example

typescript

// Vibrato effect: ramp frequency up and down
osc.onPlayRamp('frequency', 'linear').from(440).to(450).in(0.1)
osc.play()

Overrides

BaseSound.onPlayRamp

onPlaySet()

onPlaySet(type): object

Defined in: packages/core/src/oscillator.ts:293

Schedule a parameter value to be set when play() is called.

Oscillator supports additional parameters beyond Sound:

'gain': Volume level (0-1)
'pan': Stereo position (-1 to 1)
'frequency': Oscillator frequency in Hz
'detune': Detune in cents

Parameters

type

ControlType

The parameter to control

Returns

object

Fluent builder for setting value and timing

to()

to: (value) => object

Parameters

value

number

Returns

object

at()

at: (time) => void

Parameters

time

number

Returns

void

endingAt()

endingAt: (time, rampType?) => void

Parameters

time

number

rampType?

RampType

Returns

void

Example

typescript

// Start at frequency 220, glide up to 440 over 0.5 seconds
osc.onPlaySet('frequency').to(220).at(0)
osc.onPlaySet('frequency').to(440).endingAt(0.5, 'linear')
osc.play()

Overrides

BaseSound.onPlaySet

play()

play(): Promise<void>

Defined in: packages/core/src/base-sound.ts:819

Play the sound immediately.

Resumes the AudioContext if suspended, sets up the audio source, and starts playback. For finite-duration sounds (Sound, Track), automatically schedules an 'end' event when playback completes.

Returns

Promise<void>

Promise that resolves when playback begins

Example

typescript

const sound = await createSound('click.mp3')
await sound.play()

Inherited from

BaseSound.play

playAt()

playAt(time): Promise<void>

Defined in: packages/core/src/base-sound.ts:895

Play the audio source at a specific time.

This is the underlying method for all play variants. Time is measured in seconds from when the AudioContext was created (audioContext.currentTime).

Parameters

time

number

The AudioContext time when playback should start

Returns

Promise<void>

Example

typescript

// Play immediately
sound.playAt(audioContext.currentTime)

// Play in 2 seconds
sound.playAt(audioContext.currentTime + 2)

// Sync multiple sounds
const startTime = audioContext.currentTime + 0.1
sound1.playAt(startTime)
sound2.playAt(startTime)

Inherited from

BaseSound.playAt

playFor()

playFor(duration): void

Defined in: packages/core/src/base-sound.ts:849

Play for a specific duration, then stop automatically.

Parameters

duration

number

Seconds of playback before stopping

Returns

void

Example

typescript

// Play for 3 seconds
sound.playFor(3)

Inherited from

BaseSound.playFor

playIn()

playIn(when): void

Defined in: packages/core/src/base-sound.ts:834

Schedule playback after a delay.

Parameters

when

number

Seconds from now until playback starts

Returns

void

Example

typescript

// Play in 2 seconds
sound.playIn(2)

Inherited from

BaseSound.playIn

playInAndStopAfter()

playInAndStopAfter(playIn, stopAfter): void

Defined in: packages/core/src/base-sound.ts:868

Play after a delay, then stop after a duration.

Combines playIn() and stopIn() for precise timed playback.

Parameters

playIn

number

Seconds from now until playback starts

stopAfter

number

Seconds of playback before stopping (from play start)

Returns

void

Example

typescript

// Start in 1 second, play for 3 seconds
sound.playInAndStopAfter(1, 3)

Inherited from

BaseSound.playInAndStopAfter

removeEffect()

removeEffect(effect): this

Defined in: packages/core/src/base-sound.ts:435

Remove an effect from the effect chain.

Parameters

effect

Effect

The Effect instance to remove

Returns

this

this for chaining

Example

sound.removeEffect(filter)

Inherited from

BaseSound.removeEffect

removeEventListener()

Call Signature

removeEventListener<K>(type, listener, options?): void

Defined in: packages/core/src/events/typed-event-emitter.ts:70

Remove a typed event listener for known event types. Overloaded to provide type safety for known event types while remaining compatible with the native EventTarget API.

Type Parameters

K

K extends "play" | "dispose" | "stop" | "end"

Parameters

type

K

The event type (key of TMap)

listener

(event) => void

Typed event handler to remove

options?

Standard removeEventListener options

boolean | EventListenerOptions

Returns

void

Inherited from

BaseSound.removeEventListener

Call Signature

removeEventListener(type, listener, options?): void

Defined in: packages/core/src/events/typed-event-emitter.ts:75

Remove a typed event listener for known event types. Overloaded to provide type safety for known event types while remaining compatible with the native EventTarget API.

Parameters

type

string

The event type (key of TMap)

listener

Typed event handler to remove

EventListenerOrEventListenerObject | null

options?

Standard removeEventListener options

boolean | EventListenerOptions

Returns

void

Inherited from

BaseSound.removeEventListener

rewireEffects()

rewireEffects(): void

Defined in: packages/core/src/base-sound.ts:540

Re-wire the effect chain. Call this after toggling effect.bypass to update the audio routing.

Returns

void

Inherited from

BaseSound.rewireEffects

setAnalyzer()

setAnalyzer(analyzer): this

Defined in: packages/core/src/base-sound.ts:567

Attach an analyzer to this sound for visualization. The analyzer is inserted at the end of the signal chain (after effects and panner, before destination), showing the fully processed signal.

The analyzer is a passthrough node - audio flows through it unchanged while providing frequency and waveform data for visualization.

Parameters

analyzer

The Analyzer instance to attach, or null to detach

Analyzer | null

Returns

this

this for chaining

Example

const analyzer = createAnalyzer(audioContext, { fftSize: 2048 })
sound.setAnalyzer(analyzer)

function draw() {
  const freqData = analyzer.getFrequencyData()
  // Draw frequency bars
  requestAnimationFrame(draw)
}

Inherited from

BaseSound.setAnalyzer

setDestination()

setDestination(node): this

Defined in: packages/core/src/base-sound.ts:530

Set a custom destination for audio output instead of audioContext.destination. Useful for routing to sub-mixes, analyzers, or other processing chains.

Parameters

node

AudioNode

The AudioNode to route output to

Returns

this

this for chaining

Example

const analyzer = audioContext.createAnalyser()
analyzer.connect(audioContext.destination)
sound.setDestination(analyzer)

Inherited from

BaseSound.setDestination

setup()

protected setup(): void

Defined in: packages/core/src/oscillator.ts:321

Set up a fresh OscillatorNode for playback. Called automatically before each play() since OscillatorNode is single-use. The GainNode is reused across plays to keep cached references from getGainNode() stable.

Returns

void

Overrides

BaseSound.setup

stop()

stop(): Promise<void>

Defined in: packages/core/src/oscillator.ts:664

Stop the sound immediately.

Emits a 'stop' event. Safe to call when not playing (no-op).

Returns

Promise<void>

Promise that resolves when the stop is processed

Example

typescript

await sound.stop()

Overrides

BaseSound.stop

stopAt()

stopAt(time): Promise<void>

Defined in: packages/core/src/oscillator.ts:586

Stop the oscillator at a specific AudioContext time.

Applies a quick 10ms gain fade-out before stopping to prevent click/pop artifacts from abrupt waveform cutoff. If an ADSR envelope is active, the fade-out is skipped since the envelope's release handles it.

For a future time, isPlaying stays true and the 'stop' event fires at the actual stop time rather than immediately — mirroring BaseSound.stopAt's future/immediate split (H1).

Parameters

time

number

The AudioContext time when playback should stop

Returns

Promise<void>

Overrides

BaseSound.stopAt

stopIn()

stopIn(seconds): Promise<void>

Defined in: packages/core/src/base-sound.ts:1016

Stop the audio source after a delay.

Parameters

seconds

number

Seconds from now until playback stops

Returns

Promise<void>

Example

typescript

sound.play()
// Stop after 5 seconds
sound.stopIn(5)

Inherited from

BaseSound.stopIn

update()

update(type): object

Defined in: packages/core/src/oscillator.ts:247

Update an audio parameter immediately.

Overrides BaseSound.update() to accept the full ControlType including 'frequency', which is only valid on Oscillator instances.

Parameters

type

ControlType

The parameter to update ('gain', 'pan', 'detune', or 'frequency')

Returns

object

Fluent builder: .to(value).as(unit)

to()

to: (value) => object

Parameters

value

number

Returns

object

as()

as: (method) => void

Parameters

method

RatioType

Returns

void

Example

typescript

osc.update('frequency').to(880).as('ratio')
osc.update('gain').to(0.5).as('ratio')

Overrides

BaseSound.update

wireConnections()

protected wireConnections(): void

Defined in: packages/core/src/oscillator.ts:473

Wire oscillator through filters to effect chain.

Returns

void

Overrides

BaseSound.wireConnections

Class: Oscillator ​

Example ​

Extends ​

Constructors ​

Constructor ​

Parameters ​

audioContext ​

options? ​

Returns ​

Overrides ​

Properties ​

_analyzer ​

Inherited from ​

_destination ​

Inherited from ​

_isPlaying ​

Inherited from ​

_targetGain ​

Inherited from ​

audioContext ​

Inherited from ​

audioSourceNode ​

Overrides ​

clearTimeout() ​

Parameters ​

id ​

Returns ​

Inherited from ​

controller ​

Overrides ​

debug? ​

Default ​

Example ​

Inherited from ​

effectChainInput ​

Inherited from ​

effects ​

Inherited from ​

freq ​

gainNode ​

Inherited from ​

name ​

Inherited from ​

pannerNode ​

Inherited from ​

setTimeout() ​

Parameters ​

fn ​

delayMillis ​

Returns ​

Inherited from ​

startedPlayingAt ​

Inherited from ​

startOffset ​

Default ​

See ​

Inherited from ​

Accessors ​

_isLooping ​

Get Signature ​

Returns ​

Inherited from ​

disposed ​

Get Signature ​

Example ​

Returns ​

Inherited from ​

duration ​

Get Signature ​

Example ​

Returns ​

Overrides ​

durationRaw ​

Get Signature ​

Returns ​

Overrides ​

isPlaying ​

Get Signature ​

Example ​

Returns ​

Class: Oscillator

Example

Extends

Constructors

Constructor

Parameters

audioContext

options?

Returns

Overrides

Properties

_analyzer

Inherited from

_destination

Inherited from

_isPlaying

Inherited from

_targetGain

Inherited from

audioContext

Inherited from

audioSourceNode

Overrides

clearTimeout()

Parameters

id

Returns

Inherited from

controller

Overrides

debug?

Default

Example

Inherited from

effectChainInput

Inherited from

effects

Inherited from

freq

gainNode

Inherited from

name

Inherited from

pannerNode

Inherited from

setTimeout()

Parameters

fn

delayMillis

Returns

Inherited from

startedPlayingAt

Inherited from

startOffset

Default

See

Inherited from

Accessors

_isLooping

Get Signature

Returns

Inherited from

disposed

Get Signature

Example

Returns

Inherited from

duration

Get Signature

Example

Returns

Overrides

durationRaw

Get Signature

Returns

Overrides

isPlaying

Get Signature

Example

Returns