Re: AUValidation skips AUPeakLimiter Limiting Amount shown in AudioUnitHosting+Logic
Re: AUValidation skips AUPeakLimiter Limiting Amount shown in AudioUnitHosting+Logic
- Subject: Re: AUValidation skips AUPeakLimiter Limiting Amount shown in AudioUnitHosting+Logic
- From: William Stewart <email@hidden>
- Date: Wed, 16 Jun 2004 16:28:46 -0700
On 16/06/2004, at 3:12 PM, Brian Willoughby wrote:
>
I forgot to follow up on this, so here is a reiteration of my original
>
question: AUValidation does not report the read-only parameter in
>
Apple's
>
AUPeakLimiter, and I am wondering why.
The parameter doesn't exist until the AU is explicitly initialized. AUV
doesn't explicitly initialize an AU at this stage of its testing unless
the AU reports that it is needed. So, the AU is not-intiailized, and
the parameter doesn't show up. This is all fine and expected.
Bill
>
>
I understand the response below, that I should declare a read-only
>
parameter.
>
This is something I've done with AUs in the past, but I just never
>
checked
>
them in AudioUnitHosting to see if they enable that nice generic
>
meter. My
>
first hunch, before writing to the list, was that the meter was
>
created to
>
match a read-only parameter, and I attempted to use AUValidation to
>
confirm
>
this. Is there any reason why AUValidation is not showing the
>
read-only
>
parameter(s) in Apple's AUs?
>
>
Brian Willoughby
>
Sound Consulting
>
>
>
Begin forwarded message:
>
>
Cc: email@hidden
>
From: William Stewart <email@hidden>
>
Subject: Re: AUValidation skips AUPeakLimiter Limiting Amount shown in
>
AudioUnitHosting+Logic
>
Date: Mon, 24 May 2004 11:30:50 -0700
>
>
On 23/05/2004, at 2:43 AM, Brian Willoughby wrote:
>
> AUValidation reports that Apple's AUPeakLimiter has 0 UI components
>
> available,
>
> yet it also does not list the limiting amount parameter that appears
>
> in
>
> AudioUnitHosting and Logic. Where is this (read-only?)
>
> parameter/property
>
> defined? More importantly: how do I create a read-only meter in my
>
> own
>
> AudioUnits such that AUH will display them?
>
>
Just declare the parameter as read only... its defined as a param flag
>
(read/write/meta/etc...)
>
>
> Also of note is that AudioUnitHosting has a nice look for this meter,
>
> and
>
> updates it at a high rate (where is the code for that, I'm having
>
> trouble
>
> navigating the AUHosting sources), while Logic 6.4.2 mistakenly allows
>
> the user
>
> to adjust the "value" and only infrequently updates display, such that
>
> many
>
> peaks are not indicated. I'm not too worried about Logic, since I can
>
> create
>
> my own custom UI, but I'd like to know how this is working in
>
> AudioUnitHosting.
>
>
Its supported as part of the generic view that is shipped by Apple for
>
any AU. Logic uses its own version of this
>
>
Bill
>
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