---
title: "activateAudioEngine(IOAudioEngine *)"
framework: kernel
role: pseudoSymbol
path: kernel/ioaudiodevice/1811648-activateaudioengine
---

# activateAudioEngine(IOAudioEngine *)

This simply calls activateAudioEngine(IOAudioEngine *audioEngine, bool shouldStartAudioEngine) with a value of true for shouldStartAudioEngine.

## Declaration

```occ
virtual IOReturn activateAudioEngine(
 IOAudioEngine *audioEngine); 
```

## Parameters

- `audioEngine`: The IOAudioEngine instance to be activated. It is treated as a newly allocated instance.

## Return Value

Return Value Returns true if the audio engine was successfully activated.

## See Also

### Miscellaneous

- [activateAudioEngine(IOAudioEngine *, bool)](kernel/ioaudiodevice/1811655-activateaudioengine.md)
- [addTimerEvent](kernel/ioaudiodevice/1811662-addtimerevent.md)
- [attachAudioPort](kernel/ioaudiodevice/1811666-attachaudioport.md)
- [audioEngineStarting](kernel/ioaudiodevice/1811673-audioenginestarting.md)
- [audioEngineStopped](kernel/ioaudiodevice/1811679-audioenginestopped.md)
- [completePowerStateChange](kernel/ioaudiodevice/1811685-completepowerstatechange.md)
- [completePowerStateChangeAction](kernel/ioaudiodevice/1811692-completepowerstatechangeaction.md)
- [deactivateAllAudioEngines](kernel/ioaudiodevice/1811697-deactivateallaudioengines.md)
- [detachAllAudioPorts](kernel/ioaudiodevice/1811704-detachallaudioports.md)
- [dispatchTimerEvents](kernel/ioaudiodevice/1811710-dispatchtimerevents.md)
- [flushAudioControls](kernel/ioaudiodevice/1811716-flushaudiocontrols.md)
- [free](kernel/ioaudiodevice/1811723-free.md)
- [getCommandGate](kernel/ioaudiodevice/1811730-getcommandgate.md)
- [getPendingPowerState](kernel/ioaudiodevice/1811740-getpendingpowerstate.md)
- [getPowerState](kernel/ioaudiodevice/1811749-getpowerstate.md)
- [getWorkLoop](kernel/ioaudiodevice/1811757-getworkloop.md)
- [init](kernel/ioaudiodevice/1811765-init.md)
- [initHardware](kernel/ioaudiodevice/1811773-inithardware.md)
- [initiatePowerStateChange](kernel/ioaudiodevice/1811782-initiatepowerstatechange.md)
- [performPowerStateChange](kernel/ioaudiodevice/1811791-performpowerstatechange.md)
- [protectedCompletePowerStateChange](kernel/ioaudiodevice/1811798-protectedcompletepowerstatechang.md)
- [protectedSetPowerState](kernel/ioaudiodevice/1811807-protectedsetpowerstate.md)
- [removeAllTimerEvents](kernel/ioaudiodevice/1811813-removealltimerevents.md)
- [removeTimerEvent](kernel/ioaudiodevice/1811823-removetimerevent.md)
- [setConfigurationApplicationBundle](kernel/ioaudiodevice/1811829-setconfigurationapplicationbundl.md)
- [setDeviceCanBeDefault](kernel/ioaudiodevice/1811833-setdevicecanbedefault.md)
- [setDeviceName](kernel/ioaudiodevice/1811841-setdevicename.md)
- [setDeviceShortName](kernel/ioaudiodevice/1811844-setdeviceshortname.md)
- [setFamilyManagePower](kernel/ioaudiodevice/1811848-setfamilymanagepower.md)
- [setIdleAudioSleepTime](kernel/ioaudiodevice/1811852-setidleaudiosleeptime.md)
- [setManufacturerName](kernel/ioaudiodevice/1811862-setmanufacturername.md)
- [setPowerState](kernel/ioaudiodevice/1811867-setpowerstate.md)
- [setPowerStateAction](kernel/ioaudiodevice/1811878-setpowerstateaction.md)
- [start](kernel/ioaudiodevice/1811891-start.md)
- [stop](kernel/ioaudiodevice/1811898-stop.md)
- [timerFired](kernel/ioaudiodevice/1811908-timerfired.md)
- [waitForPendingPowerStateChange](kernel/ioaudiodevice/1811913-waitforpendingpowerstatechange.md)