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  "title" : "GetZeroTimestampPeriod"
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# GetZeroTimestampPeriod

Gets the zero time stamp of the clock device.

```
uint32_t GetZeroTimestampPeriod();
```

## Return Value

The zero time stamp of the clock device.

## Discussion

The return value indicates the number of sample frames the host can expect between successive timestamps returned from [`GetCurrentZeroTimestamp`](/documentation/AudioDriverKit/IOUserAudioClockDevice/GetCurrentZeroTimestamp). In other words, if [`GetCurrentZeroTimestamp`](/documentation/AudioDriverKit/IOUserAudioClockDevice/GetCurrentZeroTimestamp) returns a sample time of `x`, the host can expect that the next valid timestamp it recieves will be `x +` [`GetZeroTimestampPeriod`](/documentation/AudioDriverKit/IOUserAudioClockDevice/GetZeroTimestampPeriod).

This method synchronizes by using the work queue created by the object.

---

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