# withUnsafeAudioBufferList(_:) Provides scoped read-only access to the audio buffer list. ``` func withUnsafeAudioBufferList(_ body: (UnsafePointer) throws -> R) rethrows -> R ``` ## Parameters `body` A closure that receives a pointer to the audio buffer list. ## Return Value The value returned by the closure. ## Discussion> Warning: Although the `AudioBufferList` pointer is const, each `AudioBuffer` within > the list exposes `mData` as `UnsafeMutableRawPointer`. You must not modify the buffer > data through these pointers. Doing so results in undefined behavior and violates the > read-only contract of this type. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)