CODEWITHSUNDEEP
javascriptaudioweb-audio-api
Anas Latique
Anas Latique

Reputation: 408

Web Audio API analyser.getByteFrequencyData equivalent in Node.js

I am working with audio and trying to visualize audio data. I have no issue with doing it in the browser thanks to the Web Audio API. There is AnalyserNode.getByteFrequencyData on the Web Audio API that returns an array of values that range from 0-255, how can I produce the same values in node.js?

I have loaded an .mp3 audio file and got the channelData.

var load = require('audio-loader')

load(fileName).then(
  function(buf) {
    const channelData = buf.getChannelData(0);
  }
)

How can I get the same AnalyserNode.getByteFrequencyData values from audioBuffer and channelData in node.js?

Upvotes: 0

Views: 441

Answers (1)

chrisguttandin
chrisguttandin

Reputation: 9066

There is no exact equivalent for getByteFrequencyData() on Node.js but I think using Meyda should get you reasonably close.

They have a guide on their homepage which shows the usage with Node.js: https://meyda.js.org/guides/offline-node

You could use the PowerSpectrum feature extractor to get similar data as with getByteFrequencyData().

const Meyda = require('meyda');

Meyda.extract('powerSpectrum', channelData);

Upvotes: 1

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