Class: Mel

Constructor

new Mel(options)

Parameters:

Name	Type	Description
options	Object	Override default parameters. Properties Name Type Attributes Default Description log Boolean <optional> false Apply a logarithmic scale on the output. nbrBands Number <optional> 24 Number of filters defining the mel bands. minFreq Number <optional> 0 Minimum frequency to consider. maxFreq Number <optional> null Maximum frequency to consider. If null, is set to Nyquist frequency. power Number <optional> 1 Apply a power scaling on each mel band.

Source:

• common/operator/Mel.js, line 193

To Do:

• - implement Slaney style mel bands

Example

import lfo from 'waves-lfo/node'

// read a file from path (node only source)
const audioInFile = new lfo.source.AudioInFile({
  filename: 'path/to/file',
  frameSize: 512,
});

const slicer = new lfo.operator.Slicer({
  frameSize: 256,
  hopSize: 256,
});

const fft = new lfo.operator.Fft({
  size: 1024,
  window: 'hann',
  mode: 'power',
  norm: 'power',
});

const mel = new lfo.operator.Mel({
  log: true,
  nbrBands: 24,
});

const logger = new lfo.sink.Logger({ data: true });

audioInFile.connect(slicer);
slicer.connect(fft);
fft.connect(mel);
mel.connect(logger);

audioInFile.start();

const mel = new lfo.operator.Mel({ nbrBands: 24 });
// mandatory for use in standalone mode
mel.initStream({ frameSize: 256, frameType: 'vector', sourceSampleRate: 44100 });
mel.inputVector(fftBins);