---
title: getTimerInterval
framework: kernel
role: pseudoSymbol
path: kernel/ioaudioengine/1812174-gettimerinterval
---

# getTimerInterval

Gets the timer interval for use by the timer event.

## Declaration

```occ
virtual AbsoluteTime getTimerInterval(); 
```

## Return Value

Return Value Returns the interval for the timer event.

## Overview

Overview This method is called each time the timer event is enabled through addTimer(). The default implementation is set to return a value such that the timer event runs n times each cycle of the audio engine through the sample buffer. The value n is stored as the instance variable: numErasesPerBuffer. The default value of numErasesPerBuffer is set to IOAUDIOENGINE_DEFAULT_NUM_ERASES_PER_BUFFER which is 4. A subclass may change the value of numErasesPerBuffer or override getTimerInterval. If it is overridden, the subclass should call the superclass's implementation, compare its interval with the superclass's and return the smaller of the two.

## 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)
- [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)
- [setClockIsStable](kernel/ioaudioengine/1812306-setclockisstable.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)