# init(copying:blockSource:) Creates a block buffer by copying the given audio buffer list. ``` init(copying audioBuffers: UnsafePointer, blockSource: CMMutableDataBlockBuffer.BlockSource? = nil) ``` ## Parameters `audioBuffers` Audio buffer list to copy into the new block buffer. `blockSource` Optional source to allocate and deallocate memory for the data blocks. --- 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)