---
title: SetZeroTimeStampPeriod
framework: audiodriverkit
role: symbol
role_heading: Instance Method
path: audiodriverkit/iouseraudioclockdevice/setzerotimestampperiod
---

# SetZeroTimeStampPeriod

Sets the zero time stamp of the clock device.

## Declaration

```occ
kern_return_t SetZeroTimeStampPeriod(uint32_t in_zts_period);
```

## Parameters

- `in_zts_period`: The zero time stamp period.

## 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 The parameter indicates the number of sample frames the host can expect between successive timestamps returned from GetCurrentZeroTimestamp. In other words, if GetCurrentZeroTimestamp returns a sample time of x, the host can expect that the next valid timestamp it recieves will be x + in_zero_timestamp_period. Only set this value during the PerformDeviceConfigurationChange call. If you need to change the value at any other time, call RequestDeviceConfigurationChange. This allows I/O to stop and calls PerformDeviceConfigurationChange, during which you can set the value. This method synchronizes by using the work queue created by the object.

## See Also

### Working with Timing and Latency

- [GetSupportsPrewarming](audiodriverkit/iouseraudioclockdevice/getsupportsprewarming.md)
- [GetZeroTimestampPeriod](audiodriverkit/iouseraudioclockdevice/getzerotimestampperiod.md)
- [SetOutputLatency](audiodriverkit/iouseraudioclockdevice/setoutputlatency.md)
- [GetOutputLatency](audiodriverkit/iouseraudioclockdevice/getoutputlatency.md)
- [SetInputLatency](audiodriverkit/iouseraudioclockdevice/setinputlatency.md)
- [GetInputLatency](audiodriverkit/iouseraudioclockdevice/getinputlatency.md)