---
title: version
framework: mediatoolbox
role: symbol
role_heading: Instance Property
path: mediatoolbox/mtaudioprocessingtapcallbacks/version
---

# version

The version number of the structure.

## Declaration

```swift
var version: Int32
```

## Discussion

Discussion The value is passed as a parameter to MTAudioProcessingTapCreate(_:_:_:_:). It must be set to kMTAudioProcessingTapCallbacksVersion_0.

## See Also

### Fields

- [clientInfo](mediatoolbox/mtaudioprocessingtapcallbacks/clientinfo.md)
- [init](mediatoolbox/mtaudioprocessingtapcallbacks/init.md)
- [finalize](mediatoolbox/mtaudioprocessingtapcallbacks/finalize.md)
- [prepare](mediatoolbox/mtaudioprocessingtapcallbacks/prepare.md)
- [unprepare](mediatoolbox/mtaudioprocessingtapcallbacks/unprepare.md)
- [process](mediatoolbox/mtaudioprocessingtapcallbacks/process.md)