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# ACP_MESSAGE_AUDIO_FRAME_START

> ACP_MESSAGE_AUDIO_FRAME_START

*Audio frame start* message.

## Syntax

```cpp theme={null}
typedef struct ACP_MESSAGE_AUDIO_FRAME_START {  
    UINT32 audioFrame;  
} ACP_MESSAGE_AUDIO_FRAME_START  
```

### Members

*audioFrame*\
Type: UINT32

Audio frame index.

## Remarks

This structure is used in the [ACP\_MESSAGE\_TYPE](https://docs.xbox.com/reference/audio/acphal/enums/acp_message_type.md) enumeration. It is also used in the `ACP_MESSAGE_TYPE_AUDIO_FRAME_START` message. The message indicates the start of an audio frame.

## Requirements

**Header:** acphal.h

**Supported platforms:** XBOX One family consoles and XBOX Series consoles

## See also

[ACP\_MESSAGE\_TYPE](https://docs.xbox.com/reference/audio/acphal/enums/acp_message_type.md)\
[AcpHal](https://docs.xbox.com/reference/audio/acphal/acphal_members.md)


## Related topics

- [ACP_MESSAGE](https://docs.xbox.com/reference/audio/acphal/structs/acp_message.md)
- [AcpHal](https://docs.xbox.com/reference/audio/acphal/acphal_members.md)
- [ACP_MESSAGE_TYPE](https://docs.xbox.com/reference/audio/acphal/enums/acp_message_type.md)
- [ACP overview](https://docs.xbox.com/build/console-features/audio/overviews/acp-overview.md)
- [ACP_MESSAGE_COMMAND_COMPLETED](https://docs.xbox.com/reference/audio/acphal/structs/acp_message_command_completed.md)