pitch-shift-node

Pitch shift node for WebAudioApi.
Using the pitch-shift library to do the shifting.

Living exmaple can be find here

Install

``
npm install pitch-shift-node
`

#API

`javascript
var PitchShiftNode = require('pitch-shift-node')
`

##PitchShiftNode(audioContext,pitchShift,options)
create and return an AudioNode instance

* audioContext WebAudioApi audio context
* pitchShift number to scale the samples by
* options An object full of options to pass to the pitch shifter
+ frameSize size of frame to process (default 512)
+ hopSize the distance between frames in samples. Must divide frame size. (default frameSize/4)
+ dataSize maximal allowable size of a data frame (default frameSize)
+ sampleRate Conversion factor from samples to seconds. (default 44100)
+ analysiWindow analysis window. must be a typed array with length equl to frame size (defaults to Hann window)
+ synthesisWindow synthesis window. must be a typed array with length equal to frame size (defaults to Hann window)
+ threshold peak detection threshold. Set to 1.0 to always take maximum, otherwise set lower to detect half tones. (default 0.9)
+ minPeriod Minimal resolvable period. (default sampleRate/400)

Example

Here is a simple example of using the pitch node.

`javascript
var PitchShiftNode = require('pitch-shift-node');

var source = context.createBufferSource();
source.buffer = myBuffer;

//Create pitch shift node that scale samples by 1.25
var pitchNode = new PitchShiftNode(context,1.25);

source.connect(pitchNode);
pitchNode.connect(context.destination);
`

#Test And Play
`

First install all the NPM tools:

npm install
`

Then run npm scripts:
`
#Building the example page
npm run build

#Host build example on port 3000
npm run example
``

#Credits
(c) 2016 Chen Machluf. MIT License

Gettysburg adress reading by Britton Rea. Recording obtained from the Internet archive. http://archive.org/details/GettysburgAddress