> For a complete index of all SignalWire documentation pages, fetch https://signalwire.com/docs/llms.txt

# Cartesia

> Learn how to use Cartesia TTS voices on the SignalWire platform.

Cartesia offers a wide selection of fully multilingual voices with very low latency.
[Create a Cartesia account](https://play.cartesia.ai) to browse and test voices in the Cartesia Playground.

## Models

Cartesia provides multiple generations of its Sonic TTS model:

| Model         | Description                                                         |
| ------------- | ------------------------------------------------------------------- |
| `sonic-3`     | **Default.** Latest model with enhanced naturalness                 |
| `sonic-2`     | Second-generation model with improved quality                       |
| `sonic-turbo` | Optimized for ultra-low latency                                     |
| `sonic`       | The first version of Sonic, optimized for accuracy and low latency. |

All Cartesia voices can be used with any model.

Learn about Cartesia's latest Sonic 3 model.

Documentation for older Sonic model versions.

## Voices

Copy the voice ID from the table below:

| Voice name                       | Voice ID                               |
| :------------------------------- | :------------------------------------- |
| German Conversational Woman      | `3f4ade23-6eb4-4279-ab05-6a144947c4d5` |
| Nonfiction Man                   | `79f8b5fb-2cc8-479a-80df-29f7a7cf1a3e` |
| Friendly Sidekick                | `e00d0e4c-a5c8-443f-a8a3-473eb9a62355` |
| French Conversational Lady       | `a249eaff-1e96-4d2c-b23b-12efa4f66f41` |
| French Narrator Lady             | `8832a0b5-47b2-4751-bb22-6a8e2149303d` |
| German Reporter Woman            | `119e03e4-0705-43c9-b3ac-a658ce2b6639` |
| Indian Lady                      | `3b554273-4299-48b9-9aaf-eefd438e3941` |
| British Reading Lady             | `71a7ad14-091c-4e8e-a314-022ece01c121` |
| British Narration Lady           | `4d2fd738-3b3d-4368-957a-bb4805275bd9` |
| Japanese Children Book           | `44863732-e415-4084-8ba1-deabe34ce3d2` |
| Japanese Woman Conversational    | `2b568345-1d48-4047-b25f-7baccf842eb0` |
| Japanese Male Conversational     | `e8a863c6-22c7-4671-86ca-91cacffc038d` |
| Reading Lady                     | `15a9cd88-84b0-4a8b-95f2-5d583b54c72e` |
| Newsman                          | `d46abd1d-2d02-43e8-819f-51fb652c1c61` |
| Child                            | `2ee87190-8f84-4925-97da-e52547f9462c` |
| Meditation Lady                  | `cd17ff2d-5ea4-4695-be8f-42193949b946` |
| Maria                            | `5345cf08-6f37-424d-a5d9-8ae1101b9377` |
| 1920's Radioman                  | `41534e16-2966-4c6b-9670-111411def906` |
| Newslady                         | `bf991597-6c13-47e4-8411-91ec2de5c466` |
| Calm Lady                        | `00a77add-48d5-4ef6-8157-71e5437b282d` |
| Helpful Woman                    | `156fb8d2-335b-4950-9cb3-a2d33befec77` |
| Mexican Woman                    | `5c5ad5e7-1020-476b-8b91-fdcbe9cc313c` |
| California Girl                  | `b7d50908-b17c-442d-ad8d-810c63997ed9` |
| Korean Narrator Woman            | `663afeec-d082-4ab5-827e-2e41bf73a25b` |
| Russian Calm Lady                | `779673f3-895f-4935-b6b5-b031dc78b319` |
| Russian Narrator Man 1           | `2b3bb17d-26b9-421f-b8ca-1dd92332279f` |
| Russian Narrator Man 2           | `da05e96d-ca10-4220-9042-d8acef654fa9` |
| Russian Narrator Woman           | `642014de-c0e3-4133-adc0-36b5309c23e6` |
| Hinglish Speaking Lady           | `95d51f79-c397-46f9-b49a-23763d3eaa2d` |
| Italian Narrator Woman           | `0e21713a-5e9a-428a-bed4-90d410b87f13` |
| Polish Narrator Woman            | `575a5d29-1fdc-4d4e-9afa-5a9a71759864` |
| Chinese Female Conversational    | `e90c6678-f0d3-4767-9883-5d0ecf5894a8` |
| Pilot over Intercom              | `36b42fcb-60c5-4bec-b077-cb1a00a92ec6` |
| Chinese Commercial Man           | `eda5bbff-1ff1-4886-8ef1-4e69a77640a0` |
| French Narrator Man              | `5c3c89e5-535f-43ef-b14d-f8ffe148c1f0` |
| Spanish Narrator Man             | `a67e0421-22e0-4d5b-b586-bd4a64aee41d` |
| Reading Man                      | `f146dcec-e481-45be-8ad2-96e1e40e7f32` |
| New York Man                     | `34575e71-908f-4ab6-ab54-b08c95d6597d` |
| Friendly French Man              | `ab7c61f5-3daa-47dd-a23b-4ac0aac5f5c3` |
| Barbershop Man                   | `a0e99841-438c-4a64-b679-ae501e7d6091` |
| Indian Man                       | `638efaaa-4d0c-442e-b701-3fae16aad012` |
| Australian Customer Support Man  | `41f3c367-e0a8-4a85-89e0-c27bae9c9b6d` |
| Friendly Australian Man          | `421b3369-f63f-4b03-8980-37a44df1d4e8` |
| Wise Man                         | `b043dea0-a007-4bbe-a708-769dc0d0c569` |
| Friendly Reading Man             | `69267136-1bdc-412f-ad78-0caad210fb40` |
| Customer Support Man             | `a167e0f3-df7e-4d52-a9c3-f949145efdab` |
| Dutch Confident Man              | `9e8db62d-056f-47f3-b3b6-1b05767f9176` |
| Dutch Man                        | `4aa74047-d005-4463-ba2e-a0d9b261fb87` |
| Hindi Reporter Man               | `bdab08ad-4137-4548-b9db-6142854c7525` |
| Italian Calm Man                 | `408daed0-c597-4c27-aae8-fa0497d644bf` |
| Italian Narrator Man             | `029c3c7a-b6d9-44f0-814b-200d849830ff` |
| Swedish Narrator Man             | `38a146c3-69d7-40ad-aada-76d5a2621758` |
| Polish Confident Man             | `3d335974-4c4a-400a-84dc-ebf4b73aada6` |
| Spanish-speaking Storyteller Man | `846fa30b-6e1a-49b9-b7df-6be47092a09a` |
| Kentucky Woman                   | `4f8651b0-bbbd-46ac-8b37-5168c5923303` |
| Chinese Commercial Woman         | `0b904166-a29f-4d2e-bb20-41ca302f98e9` |
| Middle Eastern Woman             | `daf747c6-6bc2-4083-bd59-aa94dce23f5d` |
| Hindi Narrator Woman             | `c1abd502-9231-4558-a054-10ac950c356d` |
| Sarah                            | `694f9389-aac1-45b6-b726-9d9369183238` |
| Sarah Curious                    | `794f9389-aac1-45b6-b726-9d9369183238` |
| Laidback Woman                   | `21b81c14-f85b-436d-aff5-43f2e788ecf8` |
| Reflective Woman                 | `a3520a8f-226a-428d-9fcd-b0a4711a6829` |
| Helpful French Lady              | `65b25c5d-ff07-4687-a04c-da2f43ef6fa9` |
| Pleasant Brazilian Lady          | `700d1ee3-a641-4018-ba6e-899dcadc9e2b` |
| Customer Support Lady            | `829ccd10-f8b3-43cd-b8a0-4aeaa81f3b30` |
| British Lady                     | `79a125e8-cd45-4c13-8a67-188112f4dd22` |
| Wise Lady                        | `c8605446-247c-4d39-acd4-8f4c28aa363c` |
| Australian Narrator Lady         | `8985388c-1332-4ce7-8d55-789628aa3df4` |
| Indian Customer Support Lady     | `ff1bb1a9-c582-4570-9670-5f46169d0fc8` |
| Swedish Calm Lady                | `f852eb8d-a177-48cd-bf63-7e4dcab61a36` |
| Spanish Narrator Lady            | `2deb3edf-b9d8-4d06-8db9-5742fb8a3cb2` |
| Salesman                         | `820a3788-2b37-4d21-847a-b65d8a68c99a` |
| Yogaman                          | `f114a467-c40a-4db8-964d-aaba89cd08fa` |
| Movieman                         | `c45bc5ec-dc68-4feb-8829-6e6b2748095d` |
| Wizardman                        | `87748186-23bb-4158-a1eb-332911b0b708` |
| Australian Woman                 | `043cfc81-d69f-4bee-ae1e-7862cb358650` |
| Korean Calm Woman                | `29e5f8b4-b953-4160-848f-40fae182235b` |
| Friendly German Man              | `fb9fcab6-aba5-49ec-8d7e-3f1100296dde` |
| Announcer Man                    | `5619d38c-cf51-4d8e-9575-48f61a280413` |
| Wise Guide Man                   | `42b39f37-515f-4eee-8546-73e841679c1d` |
| Midwestern Man                   | `565510e8-6b45-45de-8758-13588fbaec73` |
| Kentucky Man                     | `726d5ae5-055f-4c3d-8355-d9677de68937` |
| Brazilian Young Man              | `5063f45b-d9e0-4095-b056-8f3ee055d411` |
| Chinese Call Center Man          | `3a63e2d1-1c1e-425d-8e79-5100bc910e90` |
| German Reporter Man              | `3f6e78a8-5283-42aa-b5e7-af82e8bb310c` |
| Confident British Man            | `63ff761f-c1e8-414b-b969-d1833d1c870c` |
| Southern Man                     | `98a34ef2-2140-4c28-9c71-663dc4dd7022` |
| Classy British Man               | `95856005-0332-41b0-935f-352e296aa0df` |
| Polite Man                       | `ee7ea9f8-c0c1-498c-9279-764d6b56d189` |
| Mexican Man                      | `15d0c2e2-8d29-44c3-be23-d585d5f154a1` |
| Korean Narrator Man              | `57dba6ff-fe3b-479d-836e-06f5a61cb5de` |
| Turkish Narrator Man             | `5a31e4fb-f823-4359-aa91-82c0ae9a991c` |
| Turkish Calm Man                 | `39f753ef-b0eb-41cd-aa53-2f3c284f948f` |
| Hindi Calm Man                   | `ac7ee4fa-25db-420d-bfff-f590d740aeb2` |
| Hindi Narrator Man               | `7f423809-0011-4658-ba48-a411f5e516ba` |
| Polish Narrator Man              | `4ef93bb3-682a-46e6-b881-8e157b6b4388` |
| Polish Young Man                 | `82a7fc13-2927-4e42-9b8a-bb1f9e506521` |
| Alabama Male                     | `40104aff-a015-4da1-9912-af950fbec99e` |
| Australian Male                  | `13524ffb-a918-499a-ae97-c98c7c4408c4` |
| Anime Girl                       | `1001d611-b1a8-46bd-a5ca-551b23505334` |
| Japanese Man Book                | `97e7d7a9-dfaa-4758-a936-f5f844ac34cc` |
| Sweet Lady                       | `e3827ec5-697a-4b7c-9704-1a23041bbc51` |
| Commercial Lady                  | `c2ac25f9-ecc4-4f56-9095-651354df60c0` |
| Teacher Lady                     | `573e3144-a684-4e72-ac2b-9b2063a50b53` |
| Princess                         | `8f091740-3df1-4795-8bd9-dc62d88e5131` |
| Commercial Man                   | `7360f116-6306-4e9a-b487-1235f35a0f21` |
| ASMR Lady                        | `03496517-369a-4db1-8236-3d3ae459ddf7` |
| Professional Woman               | `248be419-c632-4f23-adf1-5324ed7dbf1d` |
| Tutorial Man                     | `bd9120b6-7761-47a6-a446-77ca49132781` |
| Calm French Woman                | `a8a1eb38-5f15-4c1d-8722-7ac0f329727d` |
| New York Woman                   | `34bde396-9fde-4ebf-ad03-e3a1d1155205` |
| Spanish-speaking Lady            | `846d6cb0-2301-48b6-9683-48f5618ea2f6` |
| Midwestern Woman                 | `11af83e2-23eb-452f-956e-7fee218ccb5c` |
| Sportsman                        | `ed81fd13-2016-4a49-8fe3-c0d2761695fc` |
| Storyteller Lady                 | `996a8b96-4804-46f0-8e05-3fd4ef1a87cd` |
| Spanish-speaking Man             | `34dbb662-8e98-413c-a1ef-1a3407675fe7` |
| Doctor Mischief                  | `fb26447f-308b-471e-8b00-8e9f04284eb5` |
| Spanish-speaking Reporter Man    | `2695b6b5-5543-4be1-96d9-3967fb5e7fec` |
| Young Spanish-speaking Woman     | `db832ebd-3cb6-42e7-9d47-912b425adbaa` |
| The Merchant                     | `50d6beb4-80ea-4802-8387-6c948fe84208` |
| Stern French Man                 | `0418348a-0ca2-4e90-9986-800fb8b3bbc0` |
| Madame Mischief                  | `e13cae5c-ec59-4f71-b0a6-266df3c9bb8e` |
| German Storyteller Man           | `db229dfe-f5de-4be4-91fd-7b077c158578` |
| Female Nurse                     | `5c42302c-194b-4d0c-ba1a-8cb485c84ab9` |
| German Conversation Man          | `384b625b-da5d-49e8-a76d-a2855d4f31eb` |
| Friendly Brazilian Man           | `6a16c1f4-462b-44de-998d-ccdaa4125a0a` |
| German Woman                     | `b9de4a89-2257-424b-94c2-db18ba68c81a` |
| Southern Woman                   | `f9836c6e-a0bd-460e-9d3c-f7299fa60f94` |
| British Customer Support Lady    | `a01c369f-6d2d-4185-bc20-b32c225eab70` |
| Chinese Woman Narrator           | `d4d4b115-57a0-48ea-9a1a-9898966c2966` |

<br />

<br />

For more information, refer to Cartesia's guide to
[Choosing a Voice](https://docs.cartesia.ai/build-with-cartesia/capability-guides/choosing-a-voice).

## Usage

Cartesia voice IDs conform to the following format:

```
cartesia.<voice_id>:<model>
```

**Parameters:**

* `voice_id` (required): The UUID voice identifier from the [Voices](#voices) table
* `model` (optional): One of the Sonic models listed above (default: `sonic-3`)

**Examples:**

```
cartesia.a167e0f3-df7e-4d52-a9c3-f949145efdab
cartesia.694f9389-aac1-45b6-b726-9d9369183238:sonic-3
cartesia.829ccd10-f8b3-43cd-b8a0-4aeaa81f3b30:sonic-turbo
```

## Languages

Cartesia voices are fully multilingual when used with `sonic-multilingual`, `sonic-2`, `sonic-3`, or `sonic-3` models.
The multilingual models automatically adapt to the input text language.

Supported languages include: English, Spanish, French, German, Italian, Portuguese, Dutch, Polish, Russian, Chinese, Japanese, Korean, Hindi, Turkish, Swedish, and many more.

For the complete list, refer to Cartesia's
[Sonic 3 language support](https://docs.cartesia.ai/build-with-cartesia/tts-models/latest#language-support)
and
[Sonic 2 language support](https://docs.cartesia.ai/build-with-cartesia/tts-models/older-models#sonic-2-language-support)
references.

***

## Examples

See how to use Cartesia voices on the SignalWire platform.

Use the
[**`languages`**](/docs/swml/reference/ai/languages#use-voice-strings)
SWML method to set one or more voices for an [AI agent](/docs/swml/reference/ai).

```yaml
version: 1.0.0
sections:
  main:
  - ai:
      prompt:
        text: Have an open-ended conversation about flowers.
      languages:
        - name: English
          code: en-US
          voice: cartesia.a167e0f3-df7e-4d52-a9c3-f949145efdab
```

Alternatively, use the [**`say_voice`** parameter](/docs/swml/reference/play#variables)
of the [**`play`**](/docs/swml/reference/play)
SWML method to select a voice for basic TTS.

```yaml
version: 1.0.0
sections:
  main:
  - set:
      say_voice: "cartesia.a167e0f3-df7e-4d52-a9c3-f949145efdab"
  - play: "say:Greetings. This is the Customer Support Man voice from Cartesia's Sonic text-to-speech model."
```

```javascript
// This example uses the Node.js SDK for SignalWire's RELAY Realtime API.
const playback = await call.playTTS({ 
    text: "Greetings. This is the Customer Support Man voice from Cartesia's Sonic text-to-speech model.",
    voice: "cartesia.a167e0f3-df7e-4d52-a9c3-f949145efdab",
});
await playback.ended();
```

Cartesia voices are not yet supported in Call Flow Builder.