TTS ElevenLabs
- 01 Aug 2025
- 3 Minutes to read
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TTS ElevenLabs
- Updated on 01 Aug 2025
- 3 Minutes to read
- Contributors
- Print
- PDF
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ElevenLabs Text To Speech Integration Node
Parameters
name | description | default |
|---|---|---|
| VoiceId | ElevenLabs Specific Voice Id | JBFqnCBsd6RMkjVDRZzb |
| ModelId | ElevenLabs Specific Model Id | eleven_flash_v2_5 |
| IgnoreSslErrors | Ignore any certificate errors. Useful for testing. | true |
| Credential | API Key Credential for the ElevenLabs TTS service | empty |
| Include Wave Header | If true, all outputted audio segments will also have a 44 Byte wave header. | true |
| Force Synthesis On Every Text | If true, ElevenLabs will try to synthesise a TTS Sound on every "Text" event except for events that have the TextAttribute "streaming" . | false |
| ElevenLabs AutoMode | If true, ElevenLabs will try to reduce latency by disabling "Chunk Length Schedule", works well with "Force Synthesis On Every Text" . | true |
| ElevenLabs Chunk Length Schedule | This is an advanced setting that most users shouldn't need to use. Determines the minimum amount of text that needs to be sent and present in our buffer before audio starts being generated. | [120, 160, 250, 290] |
| Apply Text Normalization | Can be 'auto', 'on', or 'off'. Enables the TTS voice to spell out numbers. Not all models support the 'on' setting. | auto |
| Voice Settings: Stability | Defines voice stability as a float value between 0.0 -> 1.0 | 0.5 |
| Voice Settings: Similarity Boost | Defines voice similarity boost as a float value between 0.0 -> 1.0 | 0.75 |
| Voice Settings: Style | Defines voice style as a float value between 0.0 -> 1.0 | 0.0 |
| Voice Settings: Speed | Defines voice speed as a float value between 0.7 -> 1.2 | 1.0 |
| Voice Settings: Use Speaker Boost | Defines voice speaker boost option | true |
Inputs
Audio
none
Events
| name | description | known nodes that generate this event |
|---|---|---|
Every Event that Contains the Data.Text field | A TTS Synthesis audio can be generated from any event that is text based. Users can also generate their custom event that has Data.Text and send it through the Entry, or External Relay nodes. | SR Http, SR WebSocket, Translate |
Outputs
Audio
Syntesized speech is sent to output in PCM16 Format With a Wave header.
Events
| name | description |
|---|---|
| Start of TTS Fragment | This event is sent just before a TTS operation writes the result to Audio output. Contains the Text that was used for the synthesis under the Data.Text field. |
| End of TTS Fragment | This event is send just after a TTS operation has finished writing to Audio output. |
Remarks
Requirements
The node needs an ElevenLabs Api key to perform. After creating an ElevenLabs account, you can create and retrieve your api key from the api key page .
You can also see which voices are available through the Voice Lab page, and copy their ids.
The list of available models can be found here
Voice Id and API Key
Make sure you press the Add To Voice List button in your ElevenLabs account that is connected to your API Key whenever you want to try out a new voice.
Custom TTS Event
A sample tts-request event would look as follows.
{
"Event": {
"Name": "Custom TTS Event",
"Channel": 0,
"Data" : {
"Text": "hello world"
}
}
}
Channel: Channel number is necessary for locating the node that will perform the TTS operation.
Data.Text: The text that will be synthesized.
Sending Custom Events to Projects
To learn more about sending Events to projects, you can check the HTTP and External Relay pages.
Project Structure
The project structures defined in TTS Http page all apply to this node as well.
Supported flow types
Stream, Batch
Release Notes
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