---
title: setClockIsStable
framework: kernel
role: pseudoSymbol
path: kernel/ioaudioengine/1812306-setclockisstable
---

# setClockIsStable

This function sets a flag that CoreAudio uses to select its sample rate tracking algorithm. Set this to TRUE unless that results in dropped audio. If the driver is experiencing unexplained dropouts setting this FALSE might help.

## Declaration

```occ
virtual void setClockIsStable(
 boolclockIsStable); 
```

## Parameters

- `clockIsStable`: TRUE tells CoreAudio to use an agressive PLL to quickly lock to the engine's sample rate while FALSE tells CoreAudio to adjust more slowly to perceived sample rate changes that might just be the result of an unstable clock.

## See Also

### Miscellaneous

- [addAudioStream](kernel/ioaudioengine/1812081-addaudiostream.md)
- [addTimer](kernel/ioaudioengine/1812084-addtimer.md)
- [clearAllSampleBuffers](kernel/ioaudioengine/1812089-clearallsamplebuffers.md)
- [clientClosed](kernel/ioaudioengine/1812093-clientclosed.md)
- [convertInputSamplesVBR](kernel/ioaudioengine/1812098-convertinputsamplesvbr.md)
- [createDictionaryFromSampleRate](kernel/ioaudioengine/1812105-createdictionaryfromsamplerate.md)
- [createSampleRateFromDictionary](kernel/ioaudioengine/1812109-createsampleratefromdictionary.md)
- [eraseOutputSamples](kernel/ioaudioengine/1812115-eraseoutputsamples.md)
- [free](kernel/ioaudioengine/1812122-free.md)
- [getAttributeForConnection](kernel/ioaudioengine/1812127-getattributeforconnection.md)
- [getCommandGate](kernel/ioaudioengine/1812131-getcommandgate.md)
- [getCurrentSampleFrame](kernel/ioaudioengine/1812136-getcurrentsampleframe.md)
- [getRunEraseHead](kernel/ioaudioengine/1812140-getrunerasehead.md)
- [getSampleRate](kernel/ioaudioengine/1812148-getsamplerate.md)
- [getState](kernel/ioaudioengine/1812155-getstate.md)
- [getStatus](kernel/ioaudioengine/1812164-getstatus.md)
- [getTimerInterval](kernel/ioaudioengine/1812174-gettimerinterval.md)
- [getWorkLoop](kernel/ioaudioengine/1812185-getworkloop.md)
- [init](kernel/ioaudioengine/1812194-init.md)
- [initHardware](kernel/ioaudioengine/1812206-inithardware.md)
- [initKeys](kernel/ioaudioengine/1812218-initkeys.md)
- [newUserClient](kernel/ioaudioengine/1812227-newuserclient.md)
- [performAudioEngineStart](kernel/ioaudioengine/1812238-performaudioenginestart.md)
- [performAudioEngineStop](kernel/ioaudioengine/1812251-performaudioenginestop.md)
- [performErase](kernel/ioaudioengine/1812263-performerase.md)
- [performFlush](kernel/ioaudioengine/1812272-performflush.md)
- [registerService](kernel/ioaudioengine/1812282-registerservice.md)
- [removeTimer](kernel/ioaudioengine/1812286-removetimer.md)
- [resetStatusBuffer](kernel/ioaudioengine/1812290-resetstatusbuffer.md)
- [setAttributeForConnection](kernel/ioaudioengine/1812296-setattributeforconnection.md)
- [setClockDomain](kernel/ioaudioengine/1812301-setclockdomain.md)
- [setInputSampleOffset](kernel/ioaudioengine/1812309-setinputsampleoffset.md)
- [setMixClipOverhead](kernel/ioaudioengine/1812312-setmixclipoverhead.md)
- [setOutputSampleOffset](kernel/ioaudioengine/1812315-setoutputsampleoffset.md)
- [setRunEraseHead](kernel/ioaudioengine/1812317-setrunerasehead.md)
- [setSampleLatency](kernel/ioaudioengine/1812320-setsamplelatency.md)
- [setSampleRate](kernel/ioaudioengine/1812325-setsamplerate.md)
- [setState](kernel/ioaudioengine/1812329-setstate.md)
- [start(IOService *)](kernel/ioaudioengine/1812338-start.md)
- [start(IOService *, IOAudioDevice *)](kernel/ioaudioengine/1812342-start.md)
- [startAudioEngine](kernel/ioaudioengine/1812346-startaudioengine.md)
- [stop](kernel/ioaudioengine/1812350-stop.md)
- [stopAudioEngine](kernel/ioaudioengine/1812359-stopaudioengine.md)
- [timerCallback](kernel/ioaudioengine/1812365-timercallback.md)
- [timerFired](kernel/ioaudioengine/1812371-timerfired.md)