DecodedAudioSource

Audio source that supplies PCM samples on demand.

Implements

• AudioSource

Constructors

Constructor

new DecodedAudioSource(buffer: AudioBuffer, id?: string): DecodedAudioSource;

Parameters

Parameter	Type
buffer	AudioBuffer
id	string

Returns

DecodedAudioSource

Properties

Property	Modifier	Type	Description
channelCount	readonly	number	Number of audio channels.
duration	readonly	number	Total duration in seconds.
id	readonly	string	Stable identifier for caching computed STFT frames.
sampleRate	readonly	number	Sample rate in Hz.

Methods

read()

read(options: object): Float32Array;

Reads PCM samples for a specific channel and time range.

Parameters

Parameter	Type	Description
options	{ channel: number; endTime: number; startTime: number; }	Channel index and time span in seconds.
options.channel	number	-
options.endTime	number	-
options.startTime	number	-

Returns

Float32Array

Float32Array of normalized audio samples.

Implementation of

AudioSource.read

---

fromBlob()

static fromBlob(
   blob: Blob,
   options?:
  | AudioContextLike
  | {
  audioContext?: AudioContextLike;
  sampleRate?: number;
},
id?: string): Promise<DecodedAudioSource>;

Parameters

Parameter	Type
blob	Blob
options?	| AudioContextLike | { audioContext?: AudioContextLike; sampleRate?: number; }
id?	string

Returns

Promise<DecodedAudioSource>

---

fromBuffer()

static fromBuffer(
   buffer: ArrayBuffer | Uint8Array<ArrayBufferLike>,
   options?:
  | AudioContextLike
  | {
  audioContext?: AudioContextLike;
  sampleRate?: number;
},
id?: string): Promise<DecodedAudioSource>;

Parameters

Parameter	Type
buffer	ArrayBuffer | Uint8Array<ArrayBufferLike>
options?	| AudioContextLike | { audioContext?: AudioContextLike; sampleRate?: number; }
id?	string

Returns

Promise<DecodedAudioSource>

---

fromUrl()

static fromUrl(url: string, options?:
  | AudioContextLike
  | {
  audioContext?: AudioContextLike;
  sampleRate?: number;
}): Promise<DecodedAudioSource>;

Parameters

Parameter	Type
url	string
options?	| AudioContextLike | { audioContext?: AudioContextLike; sampleRate?: number; }

Returns

Promise<DecodedAudioSource>