# copyAudio(atStart:count:) Returns decoded audio samples starting from the specified temporal position. ``` func copyAudio(atStart start: Int64, count: UnsafeMutablePointer!) -> Data! ``` ## Parameters `start` The temporal position of the audio sample. `count` On input, the number of audio samples to return; on output, the actual number of samples returned. ## Return Value A data buffer with decoded audio samples at the sample rate and channel layout specified in the encoder settings. ## Discussion If the decoder does not have enough samples to return as specified in the `count` parameter, it updates the `count` parameter with the actual number of samples in the returned audio data buffer. > Note: > It’s recommended that you call the decoder for audio samples of 1 second per call, in temporal order. --- 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)