mfcc

Description:

mfcc

A library to extract Mel-Frequency Cepstral Coefficients (MFCCs) from a signal.
Usage #
A simple usage example:
import 'package:mfcc/mfcc.dart';

void main() {
var sampleRate = 16000;
var windowLength = 1024;
var windowStride = 512;
var fftSize = 512;
var numFilter = 20;
var numCoefs = 13;
List<double> mySignal = // ...
var features = MFCC.mfccFeats(mySignal, sampleRate, windowLength, windowStride, fftSize, numFilter, numCoefs);

}
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Streaming usage exemple:
import 'package:mfcc/mfcc.dart';
import 'dart:async';

void main() {
var sampleRate = 16000;
var windowLength = 1024;
var windowStride = 512;
var fftSize = 512;
var numFilter = 20;
var numCoefs = 13;

var mfcc_proc = MFCC(sampleRate, fftSize, numFilter, numCoefs, energy: false, preEmphasis: 0.97);

StreamController<List<double>> audioInput = StreamController<List<double>>(); // Stream on which the audio frame are pushed

StreamController<List<double>> featureStreamCtrl = mfcc_proc.setStream(audioInput.stream); // Feature stream controller.

StreamSubscription<List<double>> featureSub = featureStreamCtrl.stream.listen((features) { // Feature stream subscription.
doSomething(features);
})

List<double> myFrame = ... // frame of length [windowLength]

audioInput.add(myFrame);

// doSomething is called with extracted features.

mfcc_proc.cancelStream();
featureSub.cancel();
}
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Documentation #
Package documentation is available here. Generated using dartdoc.
Features and bugs #
Please file feature requests and bugs at the issue tracker.
LICENCE #
This project is under aGPLv3 licence, feel free to use and modify the code under those terms. See LICENCE.