---
title: kAVCNumSubUnitTypes
framework: IOKit
role: symbol
role_heading: Enumeration Case
platforms: [Mac Catalyst 13.0+, macOS 10.2+]
path: iokit/ioavcunittypes/kavcnumsubunittypes
---

# kAVCNumSubUnitTypes

## Declaration

```occ
kAVCNumSubUnitTypes = 0x20
```