speechmarkdown-js

Speech Markdown grammar, parser, and formatters for use with JavaScript.

Supported platforms:

• amazon-alexa
• amazon-polly
• amazon-polly-neural
• google-assistant
• microsoft-azure
• samsung-bixby

Find the architecture here

Quick start

SSML - Amazon Alexa

Convert Speech Markdown to SSML for Amazon Alexa

const smd = require('speechmarkdown-js');

const markdown = `Sample [3s] speech [250ms] markdown`;
const options = {
    platform: 'amazon-alexa'
};

const speech = new smd.SpeechMarkdown();
const ssml = speech.toSSML(markdown, options);

The resulting SSML is:

<speak>
Sample <break time="3s"/> speech <break time="250ms"/> markdown
</speak>

SSML - Google Assistant

Convert Speech Markdown to SSML for Google Assistant

const smd = require('speechmarkdown-js');

const markdown = `Sample [3s] speech [250ms] markdown`;
const options = {
    platform: 'google-assistant'
};

const speech = new smd.SpeechMarkdown();
const ssml = speech.toSSML(markdown, options);

The resulting SSML is:

<speak>
Sample <break time="3s"/> speech <break time="250ms"/> markdown
</speak>

Plain Text

Convert Speech Markdown to Plain Text

const smd = require('speechmarkdown-js');

const markdown = `Sample [3s] speech [250ms] markdown`;
const options = {};

const speech = new smd.SpeechMarkdown();
const text = speech.toText(markdown, options);

The resulting text is:

Sample speech markdown

More

Options

You can pass options into the constructor:

const smd = require('speechmarkdown-js');

const markdown = `Sample [3s] speech [250ms] markdown`;
const options = {
    platform: 'amazon-alexa'
};

const speech = new smd.SpeechMarkdown(options);
const ssml = speech.toSSML(markdown);

Or in the methods toSSML and toText:

const smd = require('speechmarkdown-js');

const markdown = `Sample [3s] speech [250ms] markdown`;
const options = {
    platform: 'amazon-alexa'
};

const speech = new smd.SpeechMarkdown();
const ssml = speech.toSSML(markdown, options);

Available options are:

• platform (string) - Determines the formatter to use to render SSML. Valid values are:

  • "amazon-alexa"
  • "amazon-polly"
  • "amazon-polly-neural"
  • "google-assistant"
  • "microsoft-azure"
  • "samsung-bixby"

• includeFormatterComment (boolean) - Adds an XML comment to the SSML output indicating the formatter used. Default is false.

• includeSpeakTag (boolean) - Determines if the <speak> tag will be rendered in the SSML output. Default is true.

• includeParagraphTag (boolean) - Determines if the <p> tag will be rendered in the SSML output. Default is false.

• preserveEmptyLines (boolean) - keep empty lines in markdown in SSML. Default is true.

• escapeXmlSymbols (boolean) - Currently only for amazon-alexa. Escape XML text. Default is false.

• voices (object) - give custom names to voices and use that in your markdown:

  {
    "platform": "amazon-alexa",
    "voices": {
      "Scott": {"voice": {"name": "Brian"}},
      "Sarah": {"voice": {"name": "Kendra"}}
    }
  }

  {
    "platform": "google-assistant",
    "voices": {
          "Brian": {"voice": {"gender": "male", "variant": 1, "language": "en-US"}},
          "Sarah": {"voice": {"gender": "female", "variant": 3, "language": "en-US"}},
        }
  }

Working on this project?

Grammar

The biggest place we need help right now is with the completion of the grammar and formatters.

Short Format

• break
• emphasis - strong
• emphasis - moderate
• emphasis - none
• emphasis - reduced
• ipa
• sub

Standard Format

• address
• audio
• break (time)
• break (strength)
• characters / chars
• date
• defaults (section)
• disappointed
• disappointed (section)
• dj (section)
• emphasis
• excited
• excited (section)
• expletive / bleep
• fraction
• interjection
• ipa
• lang
• lang (section)
• mark
• newscaster (section)
• number
• ordinal
• telephone / phone
• pitch
• rate
• sub
• time
• unit
• voice
• voice (section)
• volume / vol
• whisper

Available scripts

• clean - remove coverage data, Jest cache and transpiled files,
• build - transpile TypeScript to ES5,
• build:browser - creates single file ./dist.browser/speechmarkdown.js file for use in browser,
• build:minify - creates single file ./dist.browser/speechmarkdown.min.js file for use in browser,
• build:watch - interactive watch mode to automatically transpile source files,
• lint - lint source files and tests,
• test - run tests,
• test:watch - interactive watch mode to automatically re-run tests

License

Licensed under the MIT. See the LICENSE file for details.