Create AudioBuffer from any source
npm install audio-buffer-fromjs
var createBuffer = require('audio-buffer-from')
//mono-buffer 1024 samples
var abuf = createBuffer(1024)
//stereo-buffer 1024 samples
var abuf2 = createBuffer(1024, 2)
//buffer from data with bound audio context
var abuf3 = createBuffer(floatArray, {context: audioContext})
//empty 1-sample mono buffer with default context
var abuf4 = createBuffer()
//0-length no-context buffer
var abuf5 = createBuffer(0)
//from duration
var abuf6 = createBuffer({duration: 1})
//from pcm data
var abuf7 = createBuffer(new Uint8Array([0, 0, 255, 255]), 'interleaved 96000')
//from data-uri
var abuf8 = createBuffer('data:application/octet-stream;base64,AP8A/w==', 'uint8')
//from base64 string
var abuf9 = createBuffer('AAAAAAAAAAAAAIA/AACAPw==', 'float32 stereo planar')
//from node Buffer
var abuf10 = createBuffer(Buffer.from([0, 255, 0, 127]), 'interleaved')
`
API
$3
Create audio buffer from any source data or a number indicating length, pass options to ensure output buffer parameters. A channels number or format string can be used to shorthand options argument.
#### Source:
| Type | Interpretation |
|---|---|
| null | Blank 1-sample length buffer. |
| Number | Length of resulting buffer. |
| Array of Arrays | Every subarray is considered a channel data. |
| AudioBuffer | Clone other AudioBuffer. |
| AudioBufferList | Coalesce AudioBufferList to AudioBuffer. |
| Audio | Retrieve AudioBuffer from Audio. |
| Object | Create based on length/duration, channels/numberOfChannels and sampleRate properties. |
| Array of Numbers | Raw data, interpreted by options.format, defaults to float64. |
| Float32Array | Raw float32 data, amplitude range is -1..+1. |
| Float64Array | Raw float64 data, amplitude range is -1..+1. |
| Int8Array | Raw int8 data, amplitude range is -128..+127. |
| Uint8Array | Raw uint8 data, amplitude range is 0..255. |
| TypedArray | Any other typed array, described by options.format argument (see pcm-convert). |
| ArrayBuffer | Raw data, interpreted by options.format. |
| Buffer | Raw data, interpreted by options.format. |
| base64 string | Base64-encoded data. |
| dataURI string | DataURI string. |
| ndarray | Create from ndarray instance. The shape property is considered as [length, channels]. |
| ndsamples | Create from ndsamples instance, similar to ndarray. |
#### Options:
Property | Default | Meaning
|---|---|---
length | 1 | Buffer length. If 0, buffer is unbound from context.
context | audio-context | Audio context to bind. null-context creates context-free audio buffer.
channels, numberOfChannels | 1 | Buffer number of channels.
sampleRate, rate | 44100 | Buffer sample rate.
format | null | Source pcm format string or object, see audio-format. If null, it will be detected from the source`.