Voice library
Design the Standard British voice your product needs, described in your own words and generated in seconds. Start from one of the voices below, or write a prompt and Gradium builds yours. Either way you get a voice id you call from the API or the SDK with no setup.
Hear it
One from each of the things this accent is used for, so you can hear the range before you write anything.
Adult · Male · Conversational
A composed and smooth British adult voice perfect for technical and IT-related explanations.
Ve1zknlflaRwcAQwYoung Adult · Female · Customer Service
A young British voice with sharp, enthusiastic energy and crisp articulation, sparky and to the point for customer support and care.
y9bQqIDnyxwqK01tAdult · Female · Formal & Professional
A joyful high-pitched British adult voice perfect for sales and professional announcements.
UX3Hi2ZmK7tT0c3GYoung Adult · Female · Conversational
A joyful and hip British young adult voice that brings energy to podcasts and modern content.
ZZb4X9ueHSdRlv9qAnother 26 Standard British voices are in the catalogue, with the rest of the library. Sign in to hear them all, or design one of your own from a prompt.
Each feature below is something the prompt has to encode, or something a careless prompt will accidentally undo.
The library is a starting point, not a limit. Describe the voice you want and Voice Design generates it.
A British male voice, 40 to 55, for conversational: calm and crisp, with mid-low pitch, steady natural pacing, medium energy and warm rounded resonance. Ideal for reassuring walkthroughs, empathic de-escalation and complex IT support.
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.