VoiceStudio

VoiceStudio is a free, open source voice program you run yourself. It turns text into speech, designs voices from a description, transcribes recordings and dubs in many languages. Once you add your own VoiceStudio as a server, your assistants can use it to narrate a chapter, make a voiceover or write captions.

StellarFirm does not host VoiceStudio and does not ship it. Your assistants only talk to the copy you run, over the internet.

Which assistants use it#

• Copywriter, for audiobooks and narration
• Marketing, for voiceovers and captions

What assistants can do#

Ability	How it runs
List voices, languages and personalities	Reads on its own
Describe a voice in words	Reads on its own
Speak a script with a voice	Runs on its own when you asked for it
Design a synthetic voice from a description	Runs on its own when you asked for it
Transcribe a recording	Runs on its own when you asked for it
Check that your VoiceStudio is up	Runs on its own
Copy or clone a voice	Never offered

Nothing is published, posted or sent by this tool. Publishing a video or an audiobook still waits for your Approve, like everything else.

Setup#

1. Run VoiceStudio on your own computer or server with an access key set, so only you can use it.
2. Put it on a public https address, for example with a Cloudflare Tunnel or Tailscale Funnel. The address must be on the standard https port. A plain local address such as 127.0.0.1 cannot be reached from StellarFirm cloud.
3. Open Integrations, choose Add your own server, and paste the https address of your VoiceStudio, ending in /mcp/.
4. Choose the bearer key option and paste the access key you set in step 1.
5. Pick the assistants that may use it and save.

Good to know#

• Voice cloning is never offered, for any server you connect. If a server lists a tool that clones a voice, StellarFirm hides it and the assistant cannot call it. Assistants never imitate a real or named person's voice.
• Each voice model comes with its own licence, and VoiceStudio shows it for every model. Check that it allows your use, such as selling an audiobook, before you publish.
• Label AI voices the way each platform or retailer asks.
• Your key stays with your StellarFirm workspace and is never shown back to you.

Prompts to try#

Copywriter, use my VoiceStudio to read the first page of chapter 1 aloud in a warm, unhurried voice. Make a short sample first.

Marketing, design a calm, friendly synthetic voice and record this 30 second script for my product video: [script].