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# AudioToolbox Data Types

## Topics

### Data Types

[`typealias AUMIDIEventListBlock`](/documentation/AudioToolbox/AUMIDIEventListBlock)

[`typealias AudioFileComponentGetUserDataAtOffsetProc`](/documentation/AudioToolbox/AudioFileComponentGetUserDataAtOffsetProc)

[`typealias AudioFileComponentGetUserDataSize64Proc`](/documentation/AudioToolbox/AudioFileComponentGetUserDataSize64Proc)

[`typealias CallHostBlock`](/documentation/AudioToolbox/CallHostBlock)


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