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    "DriverKit: 21.0 -"
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  "framework" : "AudioDriverKit",
  "identifier" : "/documentation/AudioDriverKit/IOUserAudioDevice/HandleChangeSampleRate",
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  "role" : "Instance Method",
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  "title" : "HandleChangeSampleRate"
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# HandleChangeSampleRate

Tells the device the sample rate is changing.

```
virtual kern_return_t HandleChangeSampleRate(double in_sample_rate);
```

## Parameters

`in_sample_rate`

The sample rate to set, if possible, as a `double`.

## Return Value

<doc://com.apple.documentation/documentation/DriverKit/kIOReturnSuccess> on success, or another value if an error occurs. For a list of error codes, see <doc://com.apple.documentation/documentation/DriverKit/error-codes>.

## Discussion

The default implementation calls [`SetSampleRate`](/documentation/AudioDriverKit/IOUserAudioClockDevice/SetSampleRate) and returns <doc://com.apple.documentation/documentation/DriverKit/kIOReturnSuccess>. Subclass and override this method to handle changes to the sample rate and return <doc://com.apple.documentation/documentation/DriverKit/kIOReturnSuccess> upon success.

---

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