Factory Preset Creator

[d.healey]

Oh I just got what you mean about using the preset browser instead, that makes so much more sense :)

When you mention changing sound generators does that mean restoring their state or adding/removing them from the instrument? I'm thinking I might just be able to live with swapping out the sample maps and not worry about saving their state - although might be an issue if two presets need a different number of RR groups.

[Christoph Hart]

RR Groups should actually be saved within the SampleMap - if that is not the case, it's a bug and will be fixed :)

[d.healey]

Aha that should make things easier

[d.healey]

It's just occurred to me why I'm not using the built in preset browser, that will only work with the front end script so won't work with this script. I've just been trying to implement this script in a project and already I've run into a problem with it not restoring MIDI processors. One element that will likely vary between different sample sets for many instruments is the playable key range and the key-switch range and I'm currently adding that functionality with a separate script that keeps everything nice and modular but to do it with the built in preset system I'd lose the modularity. I'm again thinking it will just be easier to use a separate VSTi for each instrument although as we both know that won't be as convenient for the user.

[Christoph Hart]

Why not wrap it in a namespace and offer this in an external file that can be used from the frontend interface directly?

And changing the key colours dynamically when swapping sample maps should be no problem (just store the data in an array that correlates to the sample map list).

And if you want to change attributes of a MIDI processor, you could also directly set its attributes instead of restoring the whole thing.

[d.healey]

The namespace idea is good. The problem with storing the attributes of the MIDI processors is there are a lot of MIDI processors in some of my instruments, if there was a way to iterate through all of the attributes of each MIDI processor then that would be practical as it could then easily be automated in a loop but currently I'd have to do it manually for each processor and it would vary between projects.

[Christoph Hart]

Well, you can just create arrays with values that have the same length as the MIDI processor has attributes and go crazy with for loops:

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[d.healey]

Thanks for the code example. I think though that this still requires that I know in advance how many attributes each script processor has and I need to keep track of these manually. If we could do a for loop type thing to iterate over an arbitrary number of attributes then a few lines of code could handle any number of scripts with any number of attributes and the values of the attributes could be saved automatically into the user preset. Maybe I'm looking at this the wrong way though, I'll play around some more with your script example.

[Christoph Hart]

You need to know the number of attributes anyway when you create the preset data, or am I missing the point?

[d.healey]

Yes currently I would need to know the number of attributes, but if we had a function that could give us the number of attributes for a script then I could do something like this.

for (s in scripts)
{
	for (i = 0; i < s.numAttributes; i++)
	{
		presetData[i] = s.getAttribute(i);
	}
}

[Christoph Hart]

Ah yes, that makes sense (I thought you're creating those by hand, but for this approach, you'll need a getNumAttributes() method). I'll add this tomorrow.

[d.healey]

Thanks Christoph, should be very useful :)

[d.healey]

Could this getNumAttributes() function also work for other modules such as effects, modulators, and envelopes too?

[Christoph Hart]

Yes of course...

[Christoph Hart]

Alright, the changes are pushed to the repository.

[d.healey]

Excellent, building now!

[d.healey]

Seems to work perfectly, this is awesome. I'll be putting together a namespace version of this preset script soon which should be much more reliable and easier to use. Thanks again!

[Christoph Hart]

I noticed one caveat with this method: if you are restoring custom scripts by iterating over all attributes, it will ignore the saveInPreset property (so everything gets restored). This is because the index is just the order of declaration and if I skip non-saveInPreset parameters, there would be a mismatch between those numbers which will cause all types of problems.

However the saveInPreset property just makes sense on the main interface script anyway so it shouldn't be too much of a restriction.

Also note that you can only use float numbers in the method setAttribute(value). And if your module has a table or a sliderpack that needs to be restored, you're also out of luck and need to go back to exportState / restoreState.

BTW, the current implementation of restoreState for scripted modules loads the stored script and recompiles it. I could add another function (eg. restoreContent) which doesn't recompile things, but only restore the values of the preexisting script interface (which is much more lightweight and not causing issues with multithread locking).

[d.healey]

That would be very helpful and sounds like a very good companion function for the others we have.

[Christoph Hart]

Done. I've called them exportScriptControls / restoreScriptControls so that it's pretty clear that this works only for script modules.