Speechify

The Speechify voice implementation in Mastra provides text-to-speech capabilities using Speechify’s API.

Usage Example

import { SpeechifyVoice } from "@mastra/voice-speechify";
 
// Initialize with default configuration (uses SPEECHIFY_API_KEY environment variable)
const voice = new SpeechifyVoice();
 
// Initialize with custom configuration
const voice = new SpeechifyVoice({
  speechModel: {
    name: 'simba-english',
    apiKey: 'your-api-key'
  },
  speaker: 'george'  // Default voice
});
 
// Convert text to speech
const audioStream = await voice.speak("Hello, world!", {
  speaker: 'henry',  // Override default voice
});

Constructor Parameters

speechModel?:

SpeechifyConfig

= { name: 'simba-english' }

Configuration for text-to-speech functionality

speaker?:

SpeechifyVoiceId

= 'george'

Default voice ID to use for speech synthesis

SpeechifyConfig

name?:

VoiceModelName

= 'simba-english'

The Speechify model to use

apiKey?:

string

Speechify API key. Falls back to SPEECHIFY_API_KEY environment variable

Methods

speak()

Converts text to speech using the configured speech model and voice.

input:

string | NodeJS.ReadableStream

Text to convert to speech. If a stream is provided, it will be converted to text first.

options.speaker?:

string

= Constructor's speaker value

Override the default speaker for this request

options.model?:

VoiceModelName

= Constructor's model value

Override the default model for this request

Returns: Promise<NodeJS.ReadableStream>

getSpeakers()

Returns an array of available voice options, where each node contains:

voiceId:

string

Unique identifier for the voice

name:

string

Display name of the voice

language:

string

Language code for the voice

gender:

string

Gender of the voice

listen()

This method is not supported by Speechify and will throw an error. Speechify does not provide speech-to-text functionality.

Notes

Speechify requires an API key for authentication
The default model is ‘simba-english’
Speech-to-text functionality is not supported
Additional audio stream options can be passed through the speak() method’s options parameter

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