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Re: AudioUnit kAudioUnitProperty_ClassInfo and UI update
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Re: AudioUnit kAudioUnitProperty_ClassInfo and UI update


  • Subject: Re: AudioUnit kAudioUnitProperty_ClassInfo and UI update
  • From: William Stewart <email@hidden>
  • Date: Mon, 12 Apr 2010 14:48:11 -0700

Hi Wolfgang

It is the responsibility of the host to notify that some of the parameter values might have changed.

something like this should be done after you set the class info:

AudioUnitParameter changedUnit;
changedUnit.mAudioUnit = theChangedAU;
changedUnit.mParameterID = kAUParameterListener_AnyParameter;
AUParameterListenerNotify (NULL, NULL, &changedUnit);

Bill

On Apr 12, 2010, at 11:58 AM, Wolfgang Kundrus wrote:

> I have got a problem with some AudioUnit plugins, in this case the
> AUParametricEQ. After I call kAudioUnitProperty_ClassInfo, the UI
> update is missing. I can clearly hear that the preset changed, but no
> graphical update happens. I am out of option to try, so I am hoping to
> gather some information here. For instance, what I am not sure about
> is, whether this call should happen in the Initialized or
> Uninitialized state.
>
> The same plugin works fine in AULab.
>
> Thanks
> Wolfgang
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References: 
 >AudioUnit kAudioUnitProperty_ClassInfo and UI update (From: Wolfgang Kundrus <email@hidden>)

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