Voice Configuration

Pick a voice, design a caller persona, and write a purpose that makes calls sound right.

Picking a voice

NovaVoxx offers a curated set of natural-sounding voices. Each has a different tone and feel — try a few before committing, since what sounds fine on a demo page can feel wrong in context.

Rules of thumb:

  • Match the voice to the persona you are projecting. A casual, warm voice does not match a "senior financial advisor" bio.
  • Test on real phone audio if you can. Telephony compresses voices and emphasizes some characteristics.

Use the Play sample button next to the voice picker to hear the currently-selected voice before you save.

Browse all Pulse voices

The voice picker shows a short curated list of each provider's voices. For the Pulse provider, that curated list is only a handful of the full catalog — well over a hundred voices are available. To reach the rest, click the Browse all Pulse voices… button next to the voice picker.

The same Browse all Pulse voices button appears anywhere you choose a voice: when creating or editing an inbound receptionist, and when creating an outbound campaign. It opens a searchable dialog of every Pulse voice available on your account.

In the dialog you can:

  • Search by name, accent, or description to narrow the list.
  • Filter to Female or Male voices with the quick-filter buttons, or show All.
  • Play a sample of any voice right in the dialog before deciding (the first play of a voice takes a few seconds to generate; replays are instant).
  • Pick a voice to select it — it is added to your picker and used for the receptionist or campaign you are editing, exactly like a curated voice.

Only English-language voices are offered (accents such as American, British, Australian, Indian, and Nigerian are all included). If you add your own voice to your Ultravox/Pulse account — for example an ElevenLabs voice — it appears in the Browse all Pulse voices dialog automatically; no configuration change is needed.

Caller persona

Three fields make up the persona:

  • Caller name — a real first name, short enough to say in one breath.
  • Caller organization — the exact name your customers recognize you by.
  • Caller bio — three to five sentences explaining who the caller is and why they are calling. This is the most important input.

See the full persona design guide for examples.

Purpose and expected output

Purpose is what the call is about. Expected output is what "success" looks like. These two fields are what the AI grounds every response in, so the more specific and concrete, the better.

Good purpose: "Following up with lapsed donors who have not given in 12 months. Reminding them of past gifts and asking if they would like to renew their support at any amount."

Weak purpose: "Donor outreach."

What is next