Emotion Control

Overview

Use the <speechify:style> SSML tag to control the emotion of synthesized speech:

<speak>
  <speechify:style emotion="cheerful">
    Great news! Your order has been shipped!
  </speechify:style>
</speak>

Pass SSML as the input parameter. The API detects it automatically.

response = client.audio.speech(
    input='<speak><speechify:style emotion="cheerful">Great news!</speechify:style></speak>',
    voice_id="geffen_32",
    model="simba-3.2",
    audio_format="mp3",
)

Supported emotions

Tips for best results

• Match text to emotion: “I told you not to do that!” works with angry, not with cheerful.
• Keep sentences short: shorter sentences produce stronger emotional expression.
• Use punctuation: ! for anger/excitement, ? for uncertainty, ... for hesitation/sadness.
• Combine with SSML: pair emotions with <prosody> and <break> for finer control. See SSML docs.

Examples

<speak>
  <speechify:style emotion="angry">Stop it! Right now!</speechify:style>
</speak>