Class: SignalRecorder

Constructor

new SignalRecorder(options)

Parameters:

Name	Type	Description
options	Object	Override default parameters. Properties Name Type Attributes Default Description duration Number <optional> 10 Maximum duration of the recording. callback Number <optional> Callback to execute when a new record is ended. This can happen: stop is called on the recorder, stop is called on the source or when the buffer is full according to the given duration. ignoreLeadingZeros Object <optional> true Start the effective recording on the first non-zero value. retrieveAudioBuffer Boolean <optional> false Define if an AudioBuffer should be retrieved or only the raw Float32Array of data. (works only in browser) audioContext AudioContext <optional> null If retrieveAudioBuffer is set to true, audio context to be used in order to create the final audio buffer. (works only in browser)

Source:

• common/sink/SignalRecorder.js, line 97

To Do:

• - add option to return only the Float32Array and not an audio buffer (node compliant) `retrieveAudioBuffer: false`

Example

import * as lfo from 'waves-lfo/client';

const audioContext = new AudioContext();

navigator.mediaDevices
  .getUserMedia({ audio: true })
  .then(init)
  .catch((err) => console.error(err.stack));

function init(stream) {
  const source = audioContext.createMediaStreamSource(stream);

  const audioInNode = new lfo.source.AudioInNode({
    sourceNode: source,
    audioContext: audioContext,
  });

  const signalRecorder = new lfo.sink.SignalRecorder({
    duration: 6,
    retrieveAudioBuffer: true,
    audioContext: audioContext,
    callback: (buffer) => {
      const bufferSource = audioContext.createBufferSource();
      bufferSource.buffer = buffer;
      bufferSource.connect(audioContext.destination);
      bufferSource.start();
    }
  });

  audioInNode.connect(signalRecorder);
  audioInNode.start();
  signalRecorder.start();
});