Apple announced a suite of new Siri AI Audio Intelligence features at its iPhone Duo launch event on September 9, 2026, and simultaneously released a document explaining how the company intends to protect user privacy while enabling continuous audio processing.
The new features — Siri Recap, Live Rewind, Sound Recognition, and Music Recognition — rely on what Apple calls “ambient listening.” To address the privacy concerns that come with always-on audio, Apple says raw audio “is handled within dedicated hardware, is not saved as a file, and is not accessible to the operating system, apps, or Apple.”
The processing happens inside a Secure Exclave built into the S11 chip, which powers the Apple Watch Series 12 and Apple Watch Ultra 4. Apple describes the Secure Exclave as “a hardware-isolated compartment built into the silicon to process sensor data separately from the rest of the system.” Audio enters this compartment and is analyzed for speech, sounds, or music without the raw audio ever being transcribed or stored. Instead, it exists as a continuously overwritten buffer that never produces an audio recording.
Apple also emphasizes user control over when these features are active. Live Rewind, for example, requires a deliberate double-tap of the Digital Crown each time a user wants to activate it. When Audio Intelligence data needs to move from Apple Watch to an iPhone, Apple says it is transferred with encryption between both devices’ Secure Exclaves. Text generated by Siri Recap and Live Rewind is retained only if the user chooses to keep it, and any syncing of that text through iCloud uses end-to-end encryption, provided the user has a device passcode and iCloud two-factor authentication enabled.
The release of Apple’s privacy document alongside the feature announcement suggests the company anticipated scrutiny over the always-listening capabilities and moved to preemptively address those concerns with technical specifics.
Source: The Verge