Re: Presets etc.
Re: Presets etc.
- Subject: Re: Presets etc.
- From: "Michael Kleps [reFX]" <email@hidden>
- Date: Tue, 27 Apr 2004 21:08:56 +0200
Hi Bill,
thanks for clarifiying this. Unfortunatly I have to support VST and AU
and for simplicity I don't want to do any major changes to either
implementation. In fact, I have not modified a single line of code in
the VST version to make the AU version work. I will hence lie to the
host and tell him that I have no factory presets at all. Then the user
is forced to use my internal preset-management that is a LOT more
flexible (IMHO) then the AU one (presets can be changed and organized
in banks). VST handles presets like a RAM bank, so the user, not the
host, can decide what to do with it.
Thanks for help.
Cheers,
Mike
Am 27.04.2004 um 21:01 schrieb William Stewart:
>
These are different... The Present Preset is the name (and number for
>
a factory preset) of whatever the current state of the AU is if it
>
were to be saved.
>
>
Factory Presets are a list of presets that you deliver to the
>
application/host as a set of settings the user can apply to your AU...
>
Our intention with Factory Presets is that these are fairly static
>
(think of patches in a ROM bank on a Synth)... So, I don't believe
>
that host's should really be required to adapt to any AU arbitrarily
>
changing these. Its also a different property... The docs are I think
>
reasonably complete when describing how this works
>
(Developer/Documentation/CoreAudio/AudioUnits)
>
>
I also like Urs' solution to this... he ships a bunch of user presets
>
that you load into the correct location:
>
>
~ or / Library/Audio/Presets/u-he/Zebra
>
>
and a host that is managing user presets correctly will find these
>
presets...
>
>
Bill
>
>
On 27/04/2004, at 7:46 AM, Pavol Markovic wrote:
>
>
> For notifying host I use this in AUBase subclass:
>
>
>
> PropertyChanged(kAudioUnitProperty_PresentPreset,
>
> kAudioUnitScope_Global, 0);
>
> PropertyChanged(kAudioUnitProperty_CurrentPreset,
>
> kAudioUnitScope_Global, 0); // deprecated
>
>
>
> But works only in Rax... as I've tested...
>
>
>
> PM
>
>
>
> On 27.4.2004, at 15:13, Michael Kleps [reFX] wrote:
>
>
>
>> Hi all,
>
>>
>
>> when loading my AU, Logic asks for a list of AUPresets in
>
>> "GetPresets"
>
>> and I provide a list of 128 AUPresets. Works fine. I can choose a
>
>> preset from within Logic.
>
>>
>
>> But how can I notify Logic that this list has changed? (new presets
>
>> have been loaded by a plugin internal function).
>
>>
>
>> And how can I tell the host that the user selected another preset
>
>> (out
>
>> of the 128 list). I can select one of the 128 presets with Logic, but
>
>> if the users uses e.g. a program-change I would like to notify Logic
>
>> that the current preset changed. I tried:
>
>>
>
>> DispatchSetProperty (kAudioUnitProperty_CurrentPreset,
>
>> kAudioUnitScope_Global, 0, &AU_Presets[i], sizeof (AUPreset));
>
>> DispatchSetProperty (kAudioUnitProperty_PresentPreset,
>
>> kAudioUnitScope_Global, 0, &AU_Presets[i], sizeof (AUPreset));
>
>> SetAFactoryPresetAsCurrent(AU_Presets[i]);
>
>>
>
>> AU_Preset is an array of 128 "AUPreset"s.
>
>> "i" is the current preset-number.
>
>>
>
>> I call all three functions (just to make sure) but Logic doesn't
>
>> update it's display to reflect the change.
>
>>
>
>> Do I make any sense? Should I give up and lie to the host by telling
>
>> him I have no presets, so the list isn't even displayed and so the
>
>> user is forced to use my plugins internal preset-management? The
>
>> downside would be that I would be forced to put in my own
>
>> preset-management into every plugin I want to release as an
>
>> AudioUnit...
>
>>
>
>> Hope somebody can help me.
>
>>
>
>> Cheers,
>
>> Mike
>
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