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node-red-contrib-speaker

node-red-contrib-speaker

This node-red node accepts PCM audio data and plays it to the speakers.

It uses the node-speaker node

Install

From your .node-red directory:

npm install --unsafe-perm node-red-contrib-speaker

Note : when installing on Raspberry PI, verify that the C compiler version is 4.8 (or more) before installing the package

Usage

The input should be a raw buffer containing the audio on msg.speech.

It can be used with the IBM Watson Text to Speech service on Bluemix.

You can define :

  • the number of audio channels (default: 2).
  • the sampling resolution (default: 16-bit).
  • the sampling rate (default: 11,025 Hz).

These default values are used by the IBM Watson Text to Speech service on Bluemix.

The audio parameters can be overwritten by msg.channels, msg.bitDepth and msg.sampleRate