Imagine crafting a podcast episode without a microphone or turning your blog post into an audiobook in minutes. AI voices are transforming how we create content—faster, cheaper, and more versatile than traditional recording. In this lesson, you’ll learn to write scripts AI can perform naturally, choose the perfect voice for your project, and seamlessly add AI-generated audio to videos or slides. Let’s turn your words into compelling voice content!

AI voice generators analyze thousands of human speech samples to learn patterns in pronunciation, rhythm, and emotion. When you input text, the AI predicts how a human would say it—but it’s only as good as your script. Garbage in, garbage out! That’s why your scriptwriting skills are the secret sauce.

Try It Now with Amazon Polly (Free Tier):

1. Create a free AWS account.
2. Go to the Amazon Polly Console.
3. Select Standard under Engine.
4. Toggle on SSML for SSML support.
5. Copy-paste this SSML snippet into the text box:
6. Select a voice (e.g., "Joanna") and click Listen.

SSML (Speech Synthesis Markup Language) (Amazon Polly SSML) is the universal standard for controlling AI voices. Think of it as HTML for speech – it lets you add pauses, adjust speed, and emphasize words. Here’s a cheat sheet of key tags:

AI voices need clear, structured scripts with SSML to sound natural.

Best Practices:

1. Use Short, Clear Sentences
   • Avoid: "We’re going to the park later which is near the river unless it rains."
   • Better: "We’re going to the park later. <break time="0.5s"/> It’s near the river—unless it rains."
2. Add Phonetic Guides for Tricky Words
   • Use the <phoneme> tag with IPA symbols.
   • Example:

• IPA Resources:
  • IPA Chart
  • Amazon Polly Phoneme Table

1. Embed SSML Directives in Your Script
   Control pacing, pauses, and emphasis as you write:

After writing your SSML script, choose a voice and fine-tune its delivery.

Example Workflow:

1. Write Script with SSML:
2. Select a Voice in Amazon Polly:
   • Choose "Kendra" for a cheerful tone.
3. Synthesize & Refine:
   • Notice the voice is too fast? Add <prosody rate="80%"> to the entire script.

ElevenLabs Note:

• Use [pause 1s] instead of <break time="1s"/>.
• Adjust speed with [slow] or [fast] instead of <prosody rate>.
• See ElevenLabs Formatting Guide.

Your AI voiceover is only as good as the script it’s given. Let’s combine what you learnt with prompt writing to create more dynamic voice content.

Practical Example:

Output with SSML:

Prompt Writing Tips for Voice:

• Tone Anchoring:
  "Make the voice sound like a suspenseful movie trailer narrator"
• Pronunciation Guardrails:
  "Always spell out acronyms phonetically: NASA = <phoneme alphabet="ipa" ph="ˈnæsə">NASA"

You’ve now got the tools to turn text into speech that captivates. Whether you’re prototyping a podcast, dubbing videos, or making slides accessible, AI voices let you experiment faster. Ready to bring your scripts to life? Let’s practice!