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  "title" : "Audio File Creation Flags"
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# Audio File Creation Flags

Flags to set when creating an audio file.

## Discussion

Flags for use with the [`AudioFileCreateWithURL(_:_:_:_:_:)`](/documentation/AudioToolbox/AudioFileCreateWithURL(_:_:_:_:_:)) and [`AudioFileCreate`](/documentation/AudioToolbox/AudioFileCreate) functions.

## Topics

### Constants

[`static var eraseFile: AudioFileFlags`](/documentation/AudioToolbox/AudioFileFlags/eraseFile)

[`static var dontPageAlignAudioData: AudioFileFlags`](/documentation/AudioToolbox/AudioFileFlags/dontPageAlignAudioData)

Typically, the audio data in a file is page aligned. To make reading the file data as fast as possible, you can use page-aligned data to take advantage of optimized code paths in the file system. However, when space is at a premium, you might want to avoid the additional padding required to attain alignment. To do so, set this flag when calling [`AudioFileCreate`](/documentation/AudioToolbox/AudioFileCreate) or [`AudioFileCreateWithURL(_:_:_:_:_:)`](/documentation/AudioToolbox/AudioFileCreateWithURL(_:_:_:_:_:)).


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