The Rime TTS engine | SignalWire

Rime offers uniquely realistic voices with a focus on natural expressiveness.

Models

Model	Description
`mistv2`	Default - Updated version of mist
`arcana`	Expressive model with natural intonation
`mist` Deprecated	Fast, precise model for business applications

Mist v2

Mist is Rime’s fastest model, built for high-volume, business-critical applications.

Arcana

Arcana is Rime’s latest and greatest model, offering a variety of ultra-realistic voices prioritizing authenticity and character.

Voices

Mist v2 is the default Rime model on the SignalWire platform. To use this model, simply set the voice ID.

To use Arcana voices, set model to arcana with the languages SWML method:

1 languages:
2 - name: English
3   code: en-US
4   voice: rime.luna
5   model: arcana

Languages

As of October 29th, 2025, Rime supports the following languages:

Language	Code
English	`eng`
Spanish	`spa`
French	`fra`
German	`ger`
Hindi (Arcana only)	`hin`

Refer to the Rime docs for the most up-to-date reference to supported languages.

Usage

Format: rime.<speaker>:<model>

Examples:

rime.spore:arcana
rime.speaker1:mistv2
rime.voice123:mist

For a full demonstration and sample script, see below.

Rime dashboard

Preview Rime voices on their dashboard

Rime docs

Refer to the Rime Docs for an up-to-date list of voice IDs.

Build with Rime on SignalWire

Create a Space and add credit

If you don’t have one yet, you’ll need to create a SignalWire Space. Be sure to add some credit to test with.

Add a new Resource

Navigate to the Resources tab in your SignalWire Dashboard and click + Add New to create a new Resource.

Create a SWML Script

From the Resources menu, select SWML Script. Name it something fun and recognizable. Ours is titled Rime Wizard.

Next, paste the following starter script into the text box, and hit Save:

1 version: 1.0.0
2 sections:
3   main:
4   - ai:
5       prompt:
6         text: | 
7           You're Luna, a voice from Rime's Arcana model! 
8           Introduce yourself, and have a conversation about programmable unified communications on the SignalWire platform. 
9       languages:
10       - name: English
11         code: en-US
12         voice: rime.luna
13         model: arcana