npm install audio-lenaThe 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 |
``js
// 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();
})
`
`js
// 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();
`
`js
// Data-uri
const ogg = require('audio-lena/ogg-datauri')
let audio = new Audio()
audio.addEventListener('canplay', () => {
audio.play()
})
audio.src = ogg
`
| 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. |
Get lena record with defined format and type.
| Format | Meaning |
|---|---|
| 'mp3' | MP3-encoded data. |'wav'
| | WAV-encoded data. |'raw'
| | Raw float32 samples. |'ogg'
| | OGG-encoded samples. |'flac'
| | FLAC-encoded samples. |
| Type | Meaning |
|---|---|
| 'buffer' | _ArrayBuffer_ with data. |'base64'
| | Base64-encoded string. |'data-uri'` | Data-uri string. |
|
* Lenna in wiki.
* Lena.mp3 original.
* Lena test image.