Build a Faceless AI Video Channel · 25 min · ElevenLabs

Voiceover Generator

A channel with a different-sounding voice every video has no identity -- consistency here is the actual brand.

Hiring signal: Producing consistent-quality voiceovers at scale, with real cost awareness, is exactly the operational skill that separates a channel that can actually run 3+ videos a week from one that burns budget on inconsistent one-offs.

What you will learn

Select and lock in one consistent channel voice
Generate voiceovers from scripts with normalized audio levels
Track and manage ElevenLabs character costs across multiple videos

What You're Building

One locked-in voice, used consistently across every video — plus real cost tracking, since ElevenLabs' free tier (Lesson 1's warning) runs out fast enough to actually matter this lesson.

Pick once, use everywhere

import os
import requests

VOICE_ID = "your-chosen-voice-id"  # picked once in this lesson, reused every video

def generate_voiceover(script_text: str, output_path: str) -> dict:
    response = requests.post(
        f"https://api.elevenlabs.io/v1/text-to-speech/{VOICE_ID}",
        headers={"xi-api-key": os.environ["ELEVENLABS_API_KEY"], "Content-Type": "application/json"},
        json={
            "text": script_text,
            "voice_settings": {"stability": 0.5, "similarity_boost": 0.75},
        },
    )
    with open(output_path, "wb") as f:
        f.write(response.content)

    return {"output_path": output_path, "characters_used": len(script_text)}

VOICE_ID is a module-level constant, not something re-chosen per video -- this is the deliberate design decision this lesson opens with: a viewer who watches 5 videos from your channel should hear the SAME voice every time, which is what makes it feel like a channel and not 5 unrelated clips.

Unlock the full lesson

You've read the first 2 sections. The rest of this lesson covers Cost tracking, since the free tier is real and small, What you're building today — plus a hands-on lab, quiz, and project artifact.

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