Edge TTS

Edge TTS uses Microsoft Edge's public read-aloud API for speech synthesis. It is free, requires no API key, and supports 256+ voices across 50+ languages.

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Creating an Edge TTS Provider

1. Navigate to the TTS Providers page.
2. Click Add.
3. Select edge as the provider type.
4. Click Create.

The default model edge-read-aloud is automatically imported when the provider is created.

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Configuring the Model

Click the edge-read-aloud model to configure its settings.

Field	Description
Voice	Language + voice ID. Default: en-US-EmmaMultilingualNeural. Over 256 voices available across 50+ languages.
Format	Audio output format. Options: audio-24khz-48kbitrate-mono-mp3 (default), audio-24khz-96kbitrate-mono-mp3, webm-24khz-16bit-mono-opus.
Speed	Playback speed. Options: 0.5, 1.0 (default), 2.0, 3.0.
Pitch	Voice pitch adjustment. Range: -100 to +100, default 0.

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Assigning to a Bot

1. Open a bot's General tab.
2. Find the TTS Model dropdown.
3. Select the configured Edge TTS model.
4. Click Save.

The bot can now synthesize speech using Edge TTS.

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Testing

Use the built-in synthesis test button on the model configuration page to preview how the selected voice, format, speed, and pitch sound before assigning to a bot.