General American English

Kiefer

Assured Tone

Confident voice with strong clarity and composed delivery, ideal for presentations and customer interactions

Open in Playground Talk to sales

144/500

About this voice

Compare Kiefer with other English voices using the same script. Include the names and phrases your listeners will hear.

Compare English voices English text-to-speech guide

Native voice

General American English

Region

United States

Gender

Masculine

Style

Conversational, Emotive

Call Kiefer from the API

Use this voice ID in a Sonic text-to-speech request. Replace the transcript with your own English script to generate new speech.

Text-to-speech API reference

Voice ID: 228fca29-3a0a-435c-8728-5cb483251068

from cartesia import Cartesia

client = Cartesia(api_key="YOUR_API_KEY")

response = client.tts.generate(
    model_id="sonic-3.6",
    transcript="I can help you change the delivery address if your package hasn't shipped yet. Send me the new address, and I'll check whether we can update it.",
    voice="228fca29-3a0a-435c-8728-5cb483251068",
    language="en",
    output_format={"container": "wav", "encoding": "pcm_f32le", "sample_rate": 44100},
)
response.write_to_file("kiefer.wav")