I figured it out.
In order for the matrix modulator to properly work I need to set my filter cutoff to 100%.
Then use the "Value" knob in the Matrix Modulator module as the main Filter Cutoff knob.
I was using a 2nd UI knob that I wired to the Cutoff, but the Matrix Mod module expects you to use "Value" as the main knob/slider and "Intensity" as the modulation depth.
Setting the filter to 100% ensure that both "Value" and "Intensity" have control over the full range of the filter.

2nd time I'm trying to get Hise to work on my MacBook.

1st time I followed David Healeys instruction video by downloading release 2.0.
Back then I could open projucer but the project would build with tons of errors and warnings.
Asked in the forum and was told that I needed to download the current build and not the last stable one.

Ok, tried that and now I can't even open projucer.

• Current build download: "projucer is damaged and can not be opened"
• 2.0 build download: "you do not have permission to open this file"
  Hise.pkg: Sure... it installs, but I have no idea what to do afterwards since none of the tutorials talk about the pkg installer.

What do I need to do to get this to work on my MacBook?

I'm willing to learn but this is all very new to me and without the proper, up-to-date tutorials I have no idea what I need to do.....

@Chazrox I know it has a lot of color options, but I don't think I'm willing to give up on auto-complete for more colours : /

I've found that I really appreciate good use of colour in a script editor or IDE!
It makes it 10 times easier to read for my brain.

Sadly the HISE script editor doesn't color functions or namespaces, even though the code preview option in this forum does color functions.
Would it be possible to add this feature? Or is this something I can do myself?
I've read that this is actually not that easy to do, and there might be real technical limitations, but I don't know for sure how it works.

There's also no HISE extension for Visual Studio Code right?

namespace MyNameSpace
{
	var variable;
}

// --- Target ComboBox ---
// Only testing Filter for now
inline function onTargetBox(component, value)
{
	if (value <= 1) 	 // Disconnect MM_Filter if "None" option is selected
	{MM.connect("LFO Modulator", "MM_Filter", false);}
	
	else if (value == 2) // Connect MM_Filter if "Filter" option is selected	
	{MM.connect("LFO Modulator", "MM_Filter", true);}
}
cmbTarget.setControlCallback(onTargetBox);
MyNameSpace.variable = 1;

@David-Healey Yes the Global Modulator Container worked beautifully for this.
Thanks to your video I've now also understood the global modulator container better.

Regarding the body + release in one sampler:
That's what I've tried first, but it's bugged when using together with loop regions.
It's what I described in this earlier post you commented on:
https://forum.hise.audio/topic/14799/loud-click-artifact-when-using-releasestart-with-looping-enabled/14?_=1781354181861

I haven't gotten around to testing it with 48kHz samples yet.
But by now I've found enough use cases to split apart the sections into dedicated samplers.