Voice: narration, cloning and voice change

Connect the Scenario MCP

Connect your agent and sign in once at mcp.scenario.com. Then tell it which Scenario team and project to use, so every file lands there.

Give the agent the script and the takes

The script, one paragraph per take, and for a re-voice the recorded take: upload it with upload_asset or give its asset ID. Keep the speaker's written permission with the project; a cloned voice is trained in the web app first (Create › Train).

Brief the agent: the same line on two models

Read model_schema_get for each model first. 1. ElevenLabs v4 (model_elevenlabs-tts-v4), public voice Alice, Stability 0.5, with this text, word for word:
[calm] Every evening at six, the keeper climbs the hundred and twelve steps of the lighthouse. [short pause] The lamp is old, the stairs are older, and the cat, as usual, is already at the top.

2. Gemini 3.8 Flash TTS (model_google-gemini-3-8-flash-tts), voice Kore (Female), language English (US), with this text, word for word:
Every evening at six, the keeper climbs the hundred and twelve steps of the lighthouse. <short pause> The lamp is old, the stairs are older, and the cat, as usual, is already at the top.

The tags set the delivery and must not be read aloud. Quote the cost with a dry run first and wait for my go.

Re-voice the approved take

Run ElevenLabs Voice Changer (model_elevenlabs-voice-changer) on the approved ElevenLabs v4 take, reading model_schema_get first. Target: the public voice George, or my cloned voice if I name it. Quote the cost with a dry run first and wait for my go.

Check every take by transcribing it

Accept when each transcript matches the script word for word, no tag is read aloud and the voice stays the same across the take. Reject a missing or changed word ("night house" for "lighthouse"), a spoken tag or a drifting voice; redo only that sentence.

Wait for the jobs with jobs_wait, then transcribe every take with Gemini 3.5 Transcribe (model_google-gemini-3-5-transcribe). Show me each transcript next to the script and mark every word that differs. Quote the cost with a dry run first and wait for my go.

File and report

Create a collection for the narration with the approved takes and their transcripts, and report the models, voices, settings and every asset ID.

The same line on two models

ElevenLabs v4 with Voice Alice and Stability 0.5 takes square-bracket tags. Gemini 3.8 Flash TTS with Voice Kore (Female) and Language English (US) takes angle-bracket tags; the two styles aren't interchangeable.

[calm] Every evening at six, the keeper climbs the hundred and twelve steps of the lighthouse. [short pause] The lamp is old, the stairs are older, and the cat, as usual, is already at the top.

Every evening at six, the keeper climbs the hundred and twelve steps of the lighthouse. <short pause> The lamp is old, the stairs are older, and the cat, as usual, is already at the top.

Write for the ear

Spell numbers the way they're said, keep sentences short and let punctuation set the timing. Respell made-up names phonetically and make one take per paragraph.

A dialogue in one take

On Gemini 3.8 Flash TTS, Multi-speaker › Add Multi-speaker, then a Speaker name and a Voice for each speaker, such as Puck (Male) for the keeper. In Text, write each line as the name, a colon and the words.

Direct the delivery on ElevenLabs v4

Place each tag right before the words it changes. Stability 0.5 is a good start (lower is livelier, higher is steadier); Similarity Boost 0.75, Output Format WAV when you'll mix, a Seed to repeat a take.

[sighs] The lamp again. [slowly] One more night, and then the keeper rests.

Consent and clean sources

Get the speaker's written permission before any cloning or voice change, and keep it with the project. Run ElevenLabs Voice Isolator first on a recording with noise, echo or music.

Train a voice

Create › Train › Audio › Clone a voice › Instant Voice Cloning (IVC) › Next, on a Pro, Max or Enterprise plan. Upload at least one minute of one speaker, every sample five seconds or longer, name the voice, set its language, train, then test it in ElevenLabs v4.

Re-voice a take

Pick ElevenLabs Voice Changer, add the take under Audio (under 5 minutes) and choose the target: a Public Voice such as George, or your clone under Voice. Click Generate.

Transcribe it

Create › Text › Gemini 3.5 Transcribe, add the take under Audio, Generate, and read the transcript against the script. If a word changed, such as "night house" for "lighthouse", raise Stability or re-voice just that sentence.