iOS 27 Siri Employs WaveRNN and FastSpeech2 for Speech

Core summary

One sentence to understand this update

Files from the iOS Simulator indicate that iOS 27's Siri is utilizing WaveRNN and FastSpeech2 for its speech synthesis, both in espresso format, suggesting advanced on-device AI capabilities.

Impact & opportunity

What this could mean

This highlights Apple's investment in advanced on-device speech AI, inspiring builders to explore similar efficient and high-quality speech synthesis methods for their mobile applications.