Voices

Every Nixflex agent speaks with a voice. You set the voice when you create or edit an agent, and you can change it any time without affecting anything else about the agent.

Setting a voice

Dashboard: open an agent, go to Voice, pick a voice and preview it. API: set the voice field on the agent to the voice name.

{
  "voice": "Olivia",
  "language": "en"
}

Recommended voices

These voices work well for phone receptionists and business calls — warm, clear, and professional.

Voice	Gender	Style	Language
Olivia	Female	Friendly, confident British	English (UK)
Ashley	Female	Warm, natural American	English (US)
Edward	Male	Clear, emphatic American	English (US)
Annika	Female	Warm, engaging	German
Kilian	Male	Warm, natural	German
Sofia	Female	Clear, engaging Latin American	Spanish
Diego	Male	Soothing, gentle	Spanish
Nour	Female	Polished, friendly	Arabic
Omar	Male	Bright, confident	Arabic

Multilingual voices

Some voices speak several languages while keeping the same identity. For example, Olivia can speak English, German, Spanish, and Arabic. Set the language field to choose which language the voice speaks on a call.

Voice settings

You can fine-tune how any voice sounds:

Speed — how fast the voice talks. 1.0 is normal, 0.5 is slower, 1.5 is faster.
Expressiveness — how much natural variation the voice has. Lower is steadier, higher is livelier.

Preview before you go live

Always listen to a voice before using it on real calls. A dental clinic wants a calm, professional voice; a sales line might want something more energetic.

​Voices

​Setting a voice

​Recommended voices

​Multilingual voices

​Voice settings

​Preview before you go live