---
title: IOAudioStreamDirection
framework: IOKit
role: symbol
role_heading: Enumeration
platforms: [Mac Catalyst 13.0+, macOS 10.1+]
path: iokit/ioaudiostreamdirection
---

# IOAudioStreamDirection

Represents the direction of an IOAudioStream

## Declaration

```occ
typedef enum _IOAudioStreamDirection : unsigned int {
    ...
} IOAudioStreamDirection;
```

## Topics

### Constants

- [kIOAudioStreamDirectionOutput](iokit/ioaudiostreamdirection/kioaudiostreamdirectionoutput.md)
- [kIOAudioStreamDirectionInput](iokit/ioaudiostreamdirection/kioaudiostreamdirectioninput.md)