📰 Key Highlights

Apple has officially opened the previously marked “coming soon” Siri voice adjustment features — “Pace” and “Expressivity” — in the newly released iOS 27 developer beta 3. These two features first debuted at this year’s WWDC 26 in June, letting users go beyond simply choosing a male or female voice: with sliders, they can now adjust how fast or slow Siri speaks, as well as how much human-like emotion comes through in the voice. During setup, Siri will automatically demo everyday sentences like “You have a new message” so users can immediately feel how different combinations actually sound.

This move is part of Apple’s effort to rebuild Siri’s core architecture around generative AI. By comparison, ChatGPT rolled out more granular voice personalization options way back in December 2025 — beyond “warmth” and “enthusiasm” controls, it also offers multiple tone presets like friendly, professional, candid, and quirky. These settings affect not just how the voice sounds, but also how ChatGPT presents information.

The new Siri is deeply integrated into iOS 27, supporting multiple wake methods: voice activation, typing via a swipe-down from the Dynamic Island, pressing the side button, or launching the new standalone Siri App. Worth noting: some testers reported that certain Siri features temporarily stopped working after upgrading, or that their phones began re-indexing data — the latter is usually just the initial step of optimizing the system’s AI search and is completely normal.

💬 JudyAI Lab’s Perspective

Apple opening up Siri’s Pace and Expressivity adjustments in iOS 27 marks a new phase in the personalization race for voice AI. What’s worth paying attention to isn’t just the feature itself, but the shift in design logic behind it.

Looking at the source article, the trend was already visible early on. ChatGPT rolled out multi-dimensional tone settings back in December 2025 — warmth, enthusiasm, and presets like friendly, professional, and quirky — and these options don’t just change the voice, they also affect how information is presented. Apple’s approach puts more emphasis on real-time sensory experience during configuration: Siri demos everyday sentences like “You have a new message” on the spot, so users can feel the difference before hitting confirm. We’ve noticed this “try before you commit” interaction pattern is becoming the baseline for AI personalization features — users need to directly perceive the meaning of their choice during configuration, not just notice a difference after the fact. This is a useful reference for any AI product that outputs text or voice.

If you’re planning an AI product with styled output, it’s worth asking: does your settings interface actually let users feel the difference before they confirm?

📅 Source Information

🔗 Further Reading