---
title: SetClockDomain
framework: audiodriverkit
role: symbol
role_heading: Instance Method
path: audiodriverkit/iouseraudioclockdevice/setclockdomain
---

# SetClockDomain

Sets the clock domain value of the clock device.

## Declaration

```occ
kern_return_t SetClockDomain(uint32_t in_clock_domain);
```

## Parameters

- `in_clock_domain`: The clock domain to set, as a uint32_t. This value indicates the clock domain to which this AudioDevice belongs. Audio hardware can synchronize AudioDevices that have the same value for this property. However, a value of 0 indicates an unspecified clock domain for the device. The framework assumes devices with unspecified clock domains are separate from one another, even if they also has 0 as their clock domain value.

## Return Value

Return Value kIOReturnSuccess on success, or another value if an error occurs. For a list of error codes, see Error Codes.

## Discussion

Discussion Drivers can change the transport type of the clock device dynamically. If successful, changing the transport type sends a notification to the host to update the object state.

## See Also

### Working with Clock Domain

- [GetClockDomain](audiodriverkit/iouseraudioclockdevice/getclockdomain.md)