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

# clientInfo

App data that the system passes to the initialization callback.

## Declaration

```swift
var clientInfo: UnsafeMutableRawPointer?
```

## Discussion

Discussion The system passes this value to when it calls the MTAudioProcessingTapInitCallback function. This value can be NULL.

## See Also

### Fields

- [version](mediatoolbox/mtaudioprocessingtapcallbacks/version.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)