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Re: AudioUnit metering seems to be broken in generic views
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Re: AudioUnit metering seems to be broken in generic views


  • Subject: Re: AudioUnit metering seems to be broken in generic views
  • From: tahome izwah <email@hidden>
  • Date: Mon, 9 Nov 2009 12:40:07 +0100

Just FYI AUDynamicsProcessor's meter works in AULab on 10.5.8 so this
must be a new bug.

--th

2009/11/9 Tom Blench <email@hidden>:
> All,
>
> I've submitted this to Radar under 7356736, but I thought I might get a
> quicker response here.  I'm completely open to the idea that I've just done
> something stupid or don't understand the functionality.  Bug report copied
> below.
>
> 02-Nov-2009 03:30 PM Thomas Blench:
> Summary:
>
> Creating an AudioUnit with a read-only parameter with the
> kAudioUnitParameterFlag_MeterReadOnly flag also set results in a meter in
> the generic view, but it does not respond to having values set.  The meter
> is always at its minimum value.
>
> Additionally, Apple Audio Units such as AUDynamicsProcessor do not show
> their meter values either, ie for gain reduction.  These values appear in
> the custom view but not in the generic view.
>
> This has been confirmed in Logic Express 8 and in AU Lab on Mac OS X 10.6.1
> (I have filed this against QuickTime and given the version of OS X as the
> version number as these seemed to be the closest approximations).
>
> Steps to Reproduce:
>
> 1: Create a new AudioUnit using the "Audio Unit Effect" template in XCode
> 2: Create a read-only parameter which also has the
> kAudioUnitParameterFlag_MeterReadOnly flag set
> 3: In the Kernel::Process method, or elsewhere, set the parameter to a value
> between its minimum and maximum
> 4: Build and deploy to plug-ins folder.  Observe in AU Lab or Logic Express
> that the meter in the generic view is not reading the correct value.
>
> OR
>
> 1: Observe the meter values of the generic view of an Apple Audio Unit such
> as AUDynamicsProcessor whilst processing material which should cause the
> meters to read non-zero values.
>
> Expected Results:
>
> Meters should show expected values.
>
> Actual Results:
>
> Meters do not show expected values (always stuck at 0/minimum value such
> that meter is not "filled")
>
> Regression:
>
> I believe I saw these meters working fine on 10.5.x but do not have any such
> machines to verify this.
>
> Notes:
>
> None
>
>
>
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References: 
 >AudioUnit metering seems to be broken in generic views (From: Tom Blench <email@hidden>)

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