<!--
{
  "availability" : [
    "DriverKit: 21.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "AudioDriverKit",
  "identifier" : "/documentation/AudioDriverKit/IOUserAudioClockDevice/GetCurrentZeroTimestamp",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Method",
  "symbol" : {
    "kind" : "Instance Method",
    "modules" : [
      "AudioDriverKit"
    ],
    "preciseIdentifier" : "c:@S@IOUserAudioClockDevice@F@GetCurrentZeroTimestamp#*k#S0_#"
  },
  "title" : "GetCurrentZeroTimestamp"
}
-->

# GetCurrentZeroTimestamp

Gets the current zero timestamp value.

```
void GetCurrentZeroTimestamp(uint64_t *out_sample_time, uint64_t *out_host_time);
```

## Parameters

`out_sample_time`

On return, the most current sample time tracked by the hardware device.

`out_host_time`

On return, the most current host time tracked by the hardware device.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)