Apple

On 29.08.2006, at 23:19, Artemiy Pavlov wrote:

This will compile but won't work. Also, according to Stiwi's suggestion (BTW I am not sure how you call SetParameter and GetComponentInstance without the object, at my side it raises an error and I have to add mAudioUnit to them), I had:

That's right. This is of course pseudo code and needs some extra work.

mAudioUnit->SetParameter( kTempo, HostTempo );

AudioUnitParameter param;

param.mAudioUnit = mAudioUnit->GetComponentInstance();

param.mScope = kAudioUnitScope_Global;

param.mParameterID = kTempo;

AUEventListenerNotify(NULL, NULL, &param);

But this raises an error:

error: cannot convert 'AudioUnitParameter*' to 'const AudioUnitEvent*' for argument '3' to 'OSStatus AUEventListenerNotify(AUListenerBase*, void*, const AudioUnitEvent*)'

That's not the call i suggested. I used AUParameterListenerNotify(NULL, NULL, &param); in my code snippet instead of AUEventListenerNotify as Bill suggested.

Of course this code above will fail because it needs a AudioUnitEvent instead of an AudioUnitParameter.

If you want to use AUEventListenerNotify please follow Bills example code.

All the best,

stiwi

References:
	>Audio Units: calling SetParameter from within Process() (From: Artemiy Pavlov <email@hidden>)
	>Re: Audio Units: calling SetParameter from within Process() (From: stiwi <email@hidden>)
	>Re: Audio Units: calling SetParameter from within Process() (From: Artemiy Pavlov <email@hidden>)