Installation

import { Steps } from ‘@astrojs/starlight/components’;

Before you begin

Confirm your machine meets the System Requirements.
Have your license key or account credentials ready. If you haven’t purchased yet, visit the pricing page.

Download the installer

Go to the Download page and click Download for Windows. The installer is an NSIS .exe signed by BTGROUP.

Install UltiVoice

Run the installer

Double-click UltiVoice-Setup-3.x.x.exe. Windows SmartScreen may show a warning on first run — click More info → Run anyway. This is expected for newly signed software; the certificate is valid.
Choose install location

The default is C:\Program Files\UltiVoice. You can change this, but avoid paths with non-ASCII characters or spaces if possible.
Complete installation

Click Install and wait ~1 minute. UltiVoice places the app binary and a bundled Python sidecar in the install directory.
Launch UltiVoice

A shortcut appears on the desktop and Start menu. Launch the app — the sidecar process starts automatically in the background.

Activate your license

On first launch, UltiVoice shows the Activation screen.

Open account.ultivoice.com in your browser and sign in with your purchase email.
On the Licenses page, click Activate on this machine to generate a one-time 8-character activation code.
Enter the code in the UltiVoice activation dialog and click Activate.
UltiVoice connects to the License Authority, verifies the code, and writes a signed .lic file to your app data folder. You will not need to repeat this step unless you move to a new machine.

For more detail on machine limits and transferring a license, see Machines & Seats.

Download AI models

After activation, UltiVoice opens the main window. The first time you create a project, the app checks for required AI models and offers to download them:

Model	Size	Purpose
Whisper large-v3	~3 GB	Speech recognition (ASR)
Qwen2.5-7B GGUF	~5 GB	Translation
F5-TTS-Vi	~1 GB	Vietnamese voice synthesis
Demucs	~1 GB	Audio source separation

Downloads happen in the background. You can start configuring a project while they complete. A slow connection? You can copy pre-downloaded model files to %APPDATA%\com.btgroup.ultivoice\models — the app detects them automatically.

Verify the installation

Once models are downloaded, go to Settings → About and confirm:

The version shown matches the installer version.
Sidecar status shows Running.
GPU is detected (if applicable) — shown as CUDA next to the sidecar info.

If the sidecar shows Not running, see Troubleshooting → Sidecar won’t start.

Next steps

Your First Project — create a project and run your first dub end-to-end.