Node.js binding to the macOS native speech synthesizer

Uses N-API to bind to the native macOS AVSpeechSynthesizer API.

• Speech is returned as a Int16Array raw PCM, 22050 Hz mono
• Will recognize voices installed via the macOS OS
• Addon binaries are pre-bundled. Doesn't require any install-time postprocessing
• Supports macOS 10.14 and later, x64 and arm64

Installation

npm install @echogarden/macos-native-tts

Usage examples

Synthesize text

import { synthesize } from '@echogarden/macos-native-tts'

const text = `
Hello World! How are you doing today?
`

const { audioSamples, sampleRate } = synthesize(text, {
	voice: 'en-US',
	rate: 0.5,
	pitchMultiplier: 1.0,
	volume: 1.0,
})

The returned audioSamples is an Int16Array containing mono samples at a sample rate of sampleRate (usually 22050 or 11025 Hz).

List voices:

import { getVoiceList } from '@echogarden/macos-native-tts'

const voices = getVoiceList()

console.log(voices)

Prints:

[
  {
    identifier: 'com.apple.voice.compact.ar-001.Maged',
    name: 'Majed',
    quality: 1,
    gender: 'male',
    language: 'ar-001'
  },
  {
    identifier: 'com.apple.voice.compact.bg-BG.Daria',
    name: 'Daria',
    quality: 1,
    gender: 'female',
    language: 'bg-BG'
  },
  {
    identifier: 'com.apple.voice.compact.ca-ES.Montserrat',
    name: 'Montse',
    quality: 1,
    gender: 'female',
    language: 'ca-ES'
  },

  //...
]

Building the N-API addons

The library is bundled with pre-built addons, so recompilation shouldn't be needed.

If you still want to compile yourself, for a modification or a fork:

• In the addons directory, run npm install, which would install the necessary build tools.
• Then run npm run build-x64 (x64) or npm run build-arm64 (arm64)

License

MIT