Audio-lena NPM

audio-lena

The Lena test audio. Returns ArrayBuffer with mp3 or wav of the record.

Appropriate for testing size (1Mb), length (~12s), noisy background, visible spectral peaks with harmonics, pitch variation, mono (not default number of channels). Good for sound recovery, sfx, filtering, decoding, encoding etc.

Parameter	Value
`samplesCount`	`541184`
`duration`	`12.27s`
`numberOfChannels`	`1`
`sampleRate`	`44100`
`wav size`	`1.03 Mb`
`mp3 size`	`192.8 Kb`
`bitRate`	`705kbps`
`artist`	`Lena Stolze`
`track title`	`Oh lad le`
`album title`	`Das schreckliche Mädchen`
`year`	`2014`

Usage

// MP3 arrayBuffer
const lenaBuffer = require('audio-lena/mp3');
const context = require('audio-context')();

context.decodeAudioData(lenaBuffer, (buffer) => {
	source = context.createBufferSource();
	source.buffer = buffer;
	source.connect(context.destination);
	source.loop = true;

	source.start();
})

// Decoded arrayBuffer with float32 samples data
const buf = require('audio-lena/raw');

let lenaSamples = new Float32Array(lenaBuf)
let buffer = context.createBuffer(1, lenaSamples.length, 44100)
buffer.getChannelData(0).set(lenaSamples)

let source = context.createBufferSource();
source.buffer = buffer;
source.connect(context.destination);
source.loop = false;

source.start();

// Data-uri
const ogg = require('audio-lena/ogg-datauri')

let audio = new Audio()
audio.addEventListener('canplay', () => {
	audio.play()
})
audio.src = ogg

API

let lena = require('audio-lena')

Entry	Meaning
`audio-lena`	Lena record constructor below.
`audio-lena/raw`	ArrayBuffer with float32 samples.
`audio-lena/mp3`	ArrayBuffer with encoded mp3 data.
`audio-lena/wav`	ArrayBuffer with encoded wav data.
`audio-lena/ogg`	ArrayBuffer with encoded ogg data.
`audio-lena/flac`	ArrayBuffer with encoded flac data.
`audio-lena/raw-base64`	Base64 string with encoded float32 samples.
`audio-lena/mp3-base64`	Base64 string with encoded mp3 data.
`audio-lena/wav-base64`	Base64 string with encoded wav data.
`audio-lena/ogg-base64`	Base64 string with encoded ogg data.
`audio-lena/flac-base64`	Base64 string with encoded flac data.
`audio-lena/raw-datauri`	Data-URI string with encoded float32 samples.
`audio-lena/mp3-datauri`	Data-URI string with encoded mp3 data.
`audio-lena/wav-datauri`	Data-URI string with encoded wav data.
`audio-lena/ogg-datauri`	Data-URI string with encoded ogg data.
`audio-lena/flac-datauri`	Data-URI string with encoded flac data.