Voice library
Design your own conversational voice
Voices built for voice agents, assistants and any dialogue that has to sound unscripted rather than read, in 5 languages. Each is a voice id you call from the API or the SDK with no setup, and Voice Design covers any accent the list does not.
Also the right page for voice agent, AI assistant, chatbot and natural conversational voices.
Hear it
- TillyEnglish · Adult · Female0:00
Hear a few more
in this style
A spread across the languages this style covers. Every clip reads its own line, so listen for the voice rather than comparing the delivery.
Every accent
this style covers
Each accent has its own page, with the voices it carries and the wording that designs a new one.
- General American
- Standard German (Hochdeutsch)
- Standard British
- Standard French
- Standard Brazilian Portuguese
- European Portuguese (Lisbon)
- Castilian Spanish
- Mexican Spanish
- Australian
- Austrian German
- Irish
- Quebecois French
- Indian English
- Canadian
Another 234 conversational voices are in the catalogue. Sign in to hear them all, or design one to your own spec from a prompt.
Or design a
conversational voice
Describe the voice you need and Gradium builds it, in any accent it maps. The wording below is a place to start.
An American English male voice, 40 to 55, for conversational dialogue: easy and unforced, with mid pitch, steady natural pacing, medium energy and warm rounded resonance. Ideal for voice agents, assistant turn-taking and anything that has to sound unscripted.
Try Reuben
in the studio
Open a voice, type your own script, and listen. Same endpoints, same SDK and same latency whether you pick one from the library or design your own.