stft
A streaming-ish short time Fourier transform.
Example
var shortTimeFT = { //Frequency stuff. Process it here } { //Got data, emit it here console} var stft = var istft = //Feed stuff into signal
Install
npm install stft
require("stft")(direction, frame_size, ondata[, options])
Creates a function for processing a signal with a short time Fourier transform.
-
direction
is a flag that determines whether the stft is forward or inverse -
frame_size
is the size of a frame for the stft -
ondata
is a callback that gets fired whenever data is ready to be processed -
options
is an optional object that takes the following parametersoptions.hop_size
the amount of samples between stft hopsoptions.window_func
a windowing function, which takes a parameter from[0,1]
and returns a weight
Returns A function that can be called with a frame (either real or complex) that adds a chunk of data to the stft queue
require("stft").stft(frame_size, ondata[, options])
Short cut for require("stft")(1, frame_size, ondata, options)
require("stft").istft(frame_size, ondata[, options])
Short cut for require("stft")(-1, frame_size, ondata, options)
Credits
(c) 2013 Mikola Lysenko. MIT License