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Design your own General American voice

Design the General American 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.

Open the Voice DesignerTry it now
Any gender, any age
Design a General American voice at whatever gender and age range your product needs, from one prompt.
Textures in this set
Bright, Rich, Warm
Styles available
Conversational, Customer Service, Podcast and Ads & Social Media

Hear it

  • HarperEnglish · Adult · Female
    0:00

A few of them
to listen to

One from each of the things this accent is used for, so you can hear the range before you write anything.

Another 74 General American 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.

Sign in to hear them allDesign your own

What makes General American
sound like itself

Each feature below is something the prompt has to encode, or something a careless prompt will accidentally undo.

Rhotic
Post-vocalic /r/ is fully pronounced: car, water and father all keep an audible r. This is the clearest single split from British and Australian, and it is why a prompt that borrows a British reference for warmth will drift out of the accent partway through a line.
Father-bother merger
PALM and LOT collapse into the same vowel, so father and bother rhyme. British keeps them apart. Scripts carrying both words expose which side of the Atlantic a candidate has landed on within a sentence.
T-flapping
Intervocalic /t/ becomes a voiced tap, so butter, water and city soften towards a d. Asking for crisp or precise delivery suppresses it and can make the read sound formal or non-native, so pair precision with a purpose that wants it, such as narration.
2 more General American features, and the prompt that designs one

Or design a
general american voice

The library is a starting point, not a limit. Describe the voice you want and Voice Design generates it.

An American English 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.

Try Abigail
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.