@HISEnberg Yes HISE tutorial then custom UI instead of the simple HTML list.

I never compiled as standalone tho?

here is my adjusted script from Example:
Its probably not usable and makes it even harder to debug but might give enough context.

The HSIE example worked inside a VST for me i believe.

/** Custom User Preset Browser using a webview!

	This example project shows how to use a webview to implement a 
	custom preset browser using a HTML webview.
	
	It supports bidirectional synchronisation, so if you load a user preset,
	it will update the selection in the webview and vice versa!
	
	The state here is just a single knob that will send it's value to the webview to
	be displayed.
	
	The HTML side only consists of a javascript file that defines the
	callbacks and populates a standard HTML select element. You probably want to use something
	more fancy in the end, but the communication will be pretty similar.
*/

// All const var declarations must be at the very top in HISE
const var userPresetObject = [];
const var expansions = Engine.getExpansionList();
const var expansionInfo = [];
const var wv = Content.getComponent("WebView1");
const var webroot = FileSystem.getFolder(FileSystem.AudioFiles).getParentDirectory().getChildFile("Images/preset-browser");
const var uph = Engine.createUserPresetHandler();
var expansion = null;
var expansionPresetFolder = null;
var expansionPreset = null;
var userPresetsFolder = null;
var expansionFolders = [];
var presetPath = null;
var pathParts = null;
var webviewInitialized = false; // Flag to prevent re-initialization
var expansionFolderName = null;
var folderExists = false;
var j = 0;
var k = 0;
var expansionObject = null;
var rootFolder = null;
var folderName = null;
var wildcardRef = null;
var sourceArtwork = null;
var artworkFolder = null;
var targetFileName = null;
var targetFile = null;
const var initTimer = Engine.createTimerObject();
const var startupTimer = Engine.createTimerObject();
const var presetTimer = Engine.createTimerObject();

//Content.makeFrontInterface(600, 600);

// This is required because JS will mess up the "\\" path on Windows
inline function getEscapedFilePath(file)
{
	return file.toString(0).replace("\\", "/");
}

// Let's build up the preset database. For our example we'll use an array of
// JSON objects with a `name` and a `file` key that will be consumed by the Webview and
// populate the select element, but you're free to attach whatever other things you might need

// Get root presets
for(userPreset in FileSystem.findFiles(FileSystem.getFolder(FileSystem.UserPresets), "*.preset", true))
{
	userPresetObject.push({
		"name": userPreset.toString(1),
		"file": getEscapedFilePath(userPreset)
	});
}

// Get expansion presets
Console.print("Found " + expansions.length + " expansions");

// Collect expansion info for the webview
var expansionFolders = []; // Track unique expansion folder names

for(i = 0; i < expansions.length; i++)
{
	expansion = expansions[i];
	Console.print("Processing expansion: " + expansion.getExpansionType());
	
	// Try to get expansion root folder and look for UserPresets subfolder
	expansionPresetFolder = expansion.getRootFolder();
	
	if(expansionPresetFolder)
	{
		Console.print("Expansion root folder: " + expansionPresetFolder.toString(0));
		
	// Look for UserPresets folder within the expansion
	userPresetsFolder = expansionPresetFolder.getChildFile("UserPresets");
	
	if(userPresetsFolder)
	{
		Console.print("Found UserPresets folder in expansion: " + userPresetsFolder.toString(0));
		
		// Get presets from this expansion's UserPresets folder
		for(expansionPreset in FileSystem.findFiles(userPresetsFolder, "*.preset", true))
		{
			userPresetObject.push({
				"name": expansionPreset.toString(1),
				"file": getEscapedFilePath(expansionPreset)
			});
			
			// Extract expansion folder name from the preset path (0.2.2 working approach)
			presetPath = getEscapedFilePath(expansionPreset);
			pathParts = presetPath.split("/");
			
			// Look for the expansion folder name in the path
			// Typically: .../Expansions/ExpansionName/UserPresets/...
			for(j = 0; j < pathParts.length; j++)
			{
				if(pathParts[j] == "Expansions" && j + 1 < pathParts.length)
				{
					expansionFolderName = pathParts[j + 1];
					// Check if we already have this folder name
					folderExists = false;
					for(k = 0; k < expansionFolders.length; k++)
					{
						if(expansionFolders[k] == expansionFolderName)
						{
							folderExists = true;
							break;
						}
					}
					if(!folderExists)
					{
						expansionFolders.push(expansionFolderName);
						Console.print("Found expansion folder: " + expansionFolderName);
					}
					break;
				}
			}
		}
	}
	else
	{
		Console.print("No UserPresets folder found in expansion: " + expansion.getExpansionType());
	}
	}
	else
	{
		Console.print("No root folder found for expansion: " + expansion.getExpansionType());
	}
}

// Convert array to expansion info for the webview
// Metadata for known expansions: descriptions and tags
var expansionMeta = {
	"Hardware-Lab": {
		"description": "A collection of distorted, textured sounds with that classic, vintage synth touch. Expect experimental tones, heavy synth sounds, glitches, and that analog character processed through hardware pedals.",
		"tags": "Analog, Bright, Vintage"
	},
	"Immersive": {
		"description": "Cinematic sounds inspired by legendary film composers like Hans Zimmer and Ludwig Göransson, but also epic composers in the rap industry such as Mike Dean. Cinematic, Melodic, and built for epic atmospheres.",
		"tags": "Epic, Melodic, Cinematic"
	},
	"Pro-Essentials": {
		"description": "Your go-to expansion of proven sounds, first designed after studying the sound behind various hit songs of popular albums. Everything from simple and essential sounds to carefully processed and reliable tones.",
		"tags": "Essential, Polished, Reliable"
	}
};

for(i = 0; i < expansionFolders.length; i++)
{
	// Use the expansion handler approach - get the expansion object
	expansionObject = null;
	for(j = 0; j < expansions.length; j++)
	{
		expansion = expansions[j];
		rootFolder = expansion.getRootFolder();
		if(rootFolder)
		{
			// Handle Windows/Mac path compatibility
			var rootPath = rootFolder.toString(0).replace("\\", "/");
			folderName = rootPath.split("/").pop();
			if(folderName === expansionFolders[i])
			{
				expansionObject = expansion;
				break;
			}
		}
	}
	
	// Use specific metadata if available, otherwise fallback
	var meta = expansionMeta[expansionFolders[i]];
	var expansionDescription = meta ? meta.description : ("High-quality presets for " + expansionFolders[i]);
	var expansionTags = meta ? meta.tags : "";
	
	// Use HISE founder's method - generate complete HTML with {EXP::...} syntax
	// Use exact expansion folder name (with spaces) for {EXP::...} syntax
	var expansionNameFormatted = expansionFolders[i]; // Keep original name with spaces
	var expansionHTML = '<img class="expansion-cover" src="{EXP::' + expansionNameFormatted + '}artwork.png" alt="' + expansionFolders[i] + ' cover art" onerror="this.style.display=\'none\';" />';
	
	Console.print("Generated HTML for " + expansionFolders[i] + ": " + expansionHTML);
	
	expansionInfo.push({
		"name": expansionFolders[i],
		"type": "expansion", 
		"description": expansionDescription,
		"tags": expansionTags,
		"htmlContent": expansionHTML
	});
}

Console.print("Total presets found: " + userPresetObject.length);
Console.print("Total expansion folders found: " + expansionInfo.length);

// Debug: Show what we're sending to the webview
Console.print("Expansion info being sent to webview:");
for(i = 0; i < expansionInfo.length; i++)
{
	Console.print("  " + expansionInfo[i].name + " - " + expansionInfo[i].coverArt);
}
	
// Grab a reference to our little budddy

// That's a bit ugly, but we grab the image folder by getting the HISE project AudioFiles folder
// and then doing some next level-hacking to get a subdirectory of the Images folder which I think is a nice
// place for web stuff...

// Call this to make sure that there is no intermediate temp stuff being carried around
wv.reset();

// set the index file (this is already the default, but I'll call it here so that you know it exists)
wv.setIndexFile(webroot.getChildFile("index.html"));

// Enable caching for better performance
//wv.set("enableCache", true);

wv.set("enablePersistence", true);

// Initialize webview with proper timing
inline function initializeWebview()
{
	Console.print("=== INITIALIZING WEBVIEW ===");
	
	// Wait a bit for webview to be ready, then populate data
	initTimer.setTimerCallback(function() {
		Console.print("=== POPULATING WEBVIEW DATA (TIMER) ===");
		Console.print("Current HISE zoom level: " + Settings.getZoomLevel());
		
		// Now we call the updatePresetList function that is defined in the Javascript of the Webview 
		// (and tucked onto the global `window` object).
		wv.callFunction("updatePresetList", userPresetObject);
		
		// Also populate the left panel with expansion info
		wv.callFunction("updateExpansionPanel", expansionInfo);
		
		Console.print("=== WEBVIEW DATA POPULATED (TIMER) ===");
		
		this.stopTimer();
	});
	initTimer.startTimer(500); // Wait 500ms for webview to be ready
}

// Add webview ready callback to ensure data is sent when webview is actually ready
wv.bindCallback("webviewReady", function(args)
{
	Console.print("=== WEBVIEW READY CALLBACK TRIGGERED ===");
	Console.print("Current HISE zoom level: " + Settings.getZoomLevel());
	
	// Send data to webview now that it's confirmed ready
	// HISE should handle webview scaling automatically
	wv.callFunction("updatePresetList", userPresetObject);
	wv.callFunction("updateExpansionPanel", expansionInfo);
	
	Console.print("=== DATA SENT TO READY WEBVIEW ===");
});

// Note: Scale factor handling removed - letting HISE handle webview scaling natively
// The webview should automatically scale when HISE's zoom level changes

// Initialize the webview with a delay to ensure it's ready
startupTimer.setTimerCallback(function() {
	Console.print("=== STARTING WEBVIEW INITIALIZATION ===");
	initializeWebview();
	this.stopTimer();
});
startupTimer.startTimer(200); // Wait 200ms before initializing

inline function onKnob1Control(component, value)
{
	// This just simulates the communication from HISE -> WebView
	// (the function window.updateValue() is defined in browser.js)
	wv.callFunction("updateValue", value);
};

Content.getComponent("Knob1").setControlCallback(onKnob1Control);

// This binding will call the given function when the Webview is
// calling the loadUserPreset function (which happens in the onselection callback)
wv.bindCallback("loadUserPreset", function(args)
{
	Console.print("LOAD FROM WEBVIEW");
	Console.print("Args received: " + args);
	Console.print("Args[0]: " + args[0]);
	Console.print("Args[0] type: " + typeof args[0]);
	Console.print("Checking if args[0] == '__REQUEST_CURRENT_PRESET__': " + (args[0] == "__REQUEST_CURRENT_PRESET__"));
	
	// Check if this is a test from filter click
	if (args[0] == "__FILTER_CLICKED_TEST__") {
		Console.print("🎯 FILTER CLICKED - BROWSER CAN CALL HISE!");
		return;
	}
	
	// Check if this is a request for current preset
	if (args[0] == "__REQUEST_CURRENT_PRESET__") {
		Console.print("=== REQUEST CURRENT PRESET FROM WEBVIEW ===");
		Console.print("getUserPresetList() returned: " + Engine.getUserPresetList().length + " presets");
		Console.print("uph object available: " + (typeof uph !== 'undefined'));
		
		if (typeof uph !== 'undefined') {
			Console.print("uph.getCurrentUserPresetFile available: " + (typeof uph.getCurrentUserPresetFile === 'function'));
			Console.print("getCurrentUserPresetFile() result: " + uph.getCurrentUserPresetFile());
			
			if (uph.getCurrentUserPresetFile()) {
				Console.print("Sending back to webview: " + getEscapedFilePath(uph.getCurrentUserPresetFile()));
				wv.callFunction("setSelectedPreset", getEscapedFilePath(uph.getCurrentUserPresetFile()));
			} else {
				Console.print("No current preset file found");
			}
		}
		Console.print("=== END REQUEST CURRENT PRESET ===");
	} else {
		Engine.loadUserPreset(FileSystem.fromAbsolutePath(args[0]));
	}
});

// This binding will call the given function when the Webview is
// calling the savePresetInHise function (which happens when saving a preset)
wv.bindCallback("savePresetInHise", function(args)
{
	Console.print("=== SAVE PRESET CALLBACK TRIGGERED ===");
	Console.print("SAVE FROM WEBVIEW");
	Console.print("Args received: " + args);
	Console.print("Args type: " + typeof args);
	Console.print("Args length: " + (args ? args.length : "null"));
	
	if (args && args.length > 0) {
		var filePath = args[0];
		Console.print("File path received: " + filePath);
		
		// Create folder if the path contains a slash (indicating subfolder)
		var userPresetsDirectory = FileSystem.getFolder(FileSystem.UserPresets);
		Console.print("UserPresets directory: " + userPresetsDirectory.toString(0));
		
		// Handle Windows/Mac path compatibility for folder detection
		var normalizedPath = filePath.replace("\\", "/");
		if (normalizedPath.contains("/")) {
			var folder = normalizedPath.split("/")[0];
			Console.print("Creating folder: " + folder);
			var folderCreated = userPresetsDirectory.createDirectory(folder);
			Console.print("Directory created: " + folderCreated);
		}
		
		// Create a File object from the path
		var presetFile = userPresetsDirectory.getChildFile(filePath);
		Console.print("Created file object: " + presetFile.toString(0));
		
		// Save the current preset to this file (remove .preset extension for Engine.saveUserPreset)
		var presetPath = presetFile.toString(0).replace(".preset", "");
		Console.print("Preset path for Engine.saveUserPreset: " + presetPath);
		
		// Call Engine.saveUserPreset with the path string
		Engine.saveUserPreset(presetPath);
		Console.print("✅ Engine.saveUserPreset() called successfully");
		Console.print("✅ Preset save process completed");
	} else {
		Console.print("❌ Invalid preset data received");
		Console.print("Expected: file path string");
		Console.print("Received: " + args);
	}
	
	Console.print("=== END SAVE PRESET DEBUG ===");
});

// This binding will call the given function when the Webview is
// calling the overridePreset function (which happens when overriding current preset)
wv.bindCallback("overridePreset", function(args)
{
	Console.print("=== OVERRIDE PRESET CALLBACK TRIGGERED ===");
	Console.print("OVERRIDE FROM WEBVIEW");
	
	// Get the current user preset file path
	if (typeof uph !== 'undefined' && typeof uph.getCurrentUserPresetFile === 'function') {
		var currentPresetFile = uph.getCurrentUserPresetFile();
		Console.print("Current preset file: " + currentPresetFile);
		
		if (currentPresetFile) {
			// Extract the path without extension for Engine.saveUserPreset
			var presetPath = currentPresetFile.toString(0).replace(".preset", "");
			Console.print("Preset path for Engine.saveUserPreset: " + presetPath);
			
			// Call Engine.saveUserPreset with the current preset path
			Engine.saveUserPreset(presetPath);
			Console.print("✅ Engine.saveUserPreset() called successfully for override");
			Console.print("✅ Preset override process completed");
			
			// Send success callback to webview
			wv.callFunction("onOverrideSuccess", currentPresetFile.toString(0));
		} else {
			Console.print("❌ No current preset file found - cannot override");
			wv.callFunction("onOverrideError", "No current preset selected");
		}
	} else {
		Console.print("❌ UserPresetHandler not available");
		wv.callFunction("onOverrideError", "UserPresetHandler not available");
	}
	
	Console.print("=== END OVERRIDE PRESET DEBUG ===");
});

// This will attach a WebView function call to anytime a user preset is loaded
// and will update the selection (window.setSelectedPreset is defined in browser.js)

uph.setPostCallback(function(presetFile)
{
	Console.print("=== PRESET LOADED CALLBACK ===");
	Console.print("Raw presetFile: " + presetFile);
	Console.print("Type of presetFile: " + typeof presetFile);
	Console.print("Escaped path: " + getEscapedFilePath(presetFile));
	Console.print("=== END PRESET LOADED CALLBACK ===");
	
	wv.callFunction("setSelectedPreset", getEscapedFilePath(presetFile));
});

// Handle request for current preset selection from webview
Console.print("=== BINDING REQUEST CURRENT PRESET CALLBACK ===");
wv.bindCallback("requestCurrentPreset", function(args)
{
	Console.print("=== REQUEST CURRENT PRESET FROM WEBVIEW ===");
	
	// Try to get current preset using Engine API
	Console.print("getUserPresetList() returned: " + Engine.getUserPresetList().length + " presets");
	
	// Try to get current preset file from uph
	Console.print("uph object available: " + (typeof uph !== 'undefined'));
	
	if (typeof uph !== 'undefined') {
		Console.print("uph.getCurrentUserPresetFile available: " + (typeof uph.getCurrentUserPresetFile === 'function'));
		
		Console.print("getCurrentUserPresetFile() result: " + uph.getCurrentUserPresetFile());
		
		if (uph.getCurrentUserPresetFile()) {
			Console.print("Sending back to webview: " + getEscapedFilePath(uph.getCurrentUserPresetFile()));
			wv.callFunction("setSelectedPreset", getEscapedFilePath(uph.getCurrentUserPresetFile()));
		} else {
			Console.print("No current preset file found");
		}
	}
	
	Console.print("=== END REQUEST CURRENT PRESET ===");
});
Console.print("=== REQUEST CURRENT PRESET CALLBACK BOUND ===");

// Trigger preset selection update when webview loads
// This handles the case where plugin reopens with a preset already loaded

Console.print("=== PRESET SELECTION HANDLED BY UPH CALLBACK ===");

// This is just a zoom factor combobox that demonstrates the correct scaling
// of the WebView - HISE handles webview scaling natively
inline function onZoomFactorControl(component, value)
{
	if(value)
	{
		Settings.setZoomLevel(component.getItemText());
		Console.print("Zoom changed to: " + component.getItemText() + " - HISE will handle webview scaling automatically");
	}
};

Content.getComponent("ZoomFactor").setControlCallback(onZoomFactorControl);

Also make sure if offline you have persistance and cache enabled.
I also clear the exported_webviews folder from time to time

If it works in HISE it usually works in VST build aswell at least on my end.
The scaling and initializing bugs i had were both in HISE and build.

@HISEnberg I wanted to try if next if having webview dimeansions not fixed but using something dynamic like VH or REM like in web context would fix scaling.

No i was not able to solve this onfortunately - I shipped my VST without scaling. Which is a bummer but the issue kind of hit me last second and i did not ahve the time to do a ton of testing :)

The rest of the preset browser is working like a charm no issues there.
At the beginning of this thread it seemded to be fixed for @Casey-Kolb tho?

Since i have not seen so many webview browsers other than HISE example does this issue also occur on your end? @HISEnberg

@Chazrox We used sample robot to do the multisample recordings. It essentially plays MIDI and records/ crops the receiving sounds. That way it is also possible to have some analog end of chain effects - or make monophonic synths polyphonic. :)

@lacroix The samples took nearly a year - the development was around 4 months i would says :)

@HISEnberg we have MIDI scripts but you are able to bypass them (glide and pitch envelope)

Good to know that there is no issue on your end.

A single wavegen work fine.

I will remove more and more from my project to see what causes this.

Strange is that is only on one OS in one DAW.

@d-healey Somehow I have to compensate for my poor programming skills :)
thank you!

Today my partner Viom (Producer) and I released our first VST instrument.
You can see it in action here:
www.eraformaudio.com
Completely build in/with HISE :)

I usually create fairly basic effect plugins over here (also HISE)

https://www.prototype.audio

Thanks for everyone who answered my thousand questions about expansions and webview :)
Hope you find this post interesting! best, Julian

@HISEnberg Good idea! and +1 for the FLStudio impressions free = lots of users :)
Enabling "keep focus" did not change the behaviour.

@Christoph-Hart

@Christoph-Hart said in WIN FL Studio: Notes cut when playing with PC-Keyboard:

Am I understanding this correctly and we are talking about playing notes on the actual computer keyboard?

Yes the common FL-Studio user is producing on a laptop. +30.000-70.000 users each DAY

So we have a couple million potential users that produce like that :)

@Christoph-Hart said in WIN FL Studio: Notes cut when playing with PC-Keyboard:

Have you checked whether this happens with other plugins too? Some computers do not allow more than two keys pressed at the same time, maybe it's a system wide issue?

The issue only exists in this combination WIN and FL Studio - it does not occur on other plugins. We have tested on 3 different WIN - FL studio builds so far.

I can provide some more varied testing (variable generators/adsrs/projects) after tomorrows launch.

@Christoph-Hart just tested with default AHDSR envelope and it is not playable with KB aswell.

Bad thing is that its only on WIN and FL Studio - and has the biggest userbase.

@It_Used It could be flex envelope. But release is 3 october so changing my ADSR setup is not possible.

@Christoph-Hart
Any minimal snippet/example on how to make one of the HISE examples retain scale factor?
Open/close in DAW resets back to 100% same goes for F5 in HISE.

Yes an example would be great i still dont understand 100% how it works.

@bendurso I have some troubles

What works: creating a .json with external samplepath that gets saved in AppData
What does not: using Expansion.setSampleFolder to tell HISE the path
Link Files: The link are not reliable on mac on my end - I have HISE_DEACTIVATE_OVERLAY=1 and tested/created the link files manually via the stock settings panel:

LinkOSX file

/Volumes/WD_BLACK/Music/Fraction/Samples (all ch1 files go here)

<?xml version="1.0" encoding="UTF-8"?>

<GLOBAL_SETTINGS DISK_MODE="0" SCALE_FACTOR="1.0" VOICE_AMOUNT_MULTIPLIER="2"
                 MIDI_CHANNELS="1" SAMPLES_FOUND="0" OPEN_GL="0"/>

Sometimes the link file worked (when using the settings panel) but sometimes it does not work...
Tested different folders, paths, locations etc. no pattern yet.

Edit:
I got sound when i removed all expansion content from AppData/Plugin/Expansion and pasted the LinkOSX file in my Expansion folder instead. :o

Worked, link file is needed in empty expansion folder and also in AppData root folder.

Thanks for the help guys tho this was quite hard as a first timer. :)

@Christoph-Hart Okay i will try to utilize the linker files and set path with them.

If it does not work maybe i can still read it and override HISE expansion search path via API.

If you have examples on how to set a custom expansion path for HISE lmk.

Will look into Rhapsody path handling aswell. @d-healey

@d-healey Okay that makes sense - where/how does Rhapsody store and recall the locations of the users Expansion Samples? Is it custom or is HISE doing it via the the startup "overlay"?

@d-healey This would make sense, but i have not found anything that confirms that.

If anybody can shine some light on how users can install/move expansions, this would help a ton.

@Casey-Kolb @Christoph-Hart I am running into this exact issue.

Webview is initialized "hidden" since its in a panel.

Does not save applied scale factor when re-opening VST:

Any help? Same issue tested on "WebViewTests Preset browser"
scaleFactorToZoom = enabled
fixed pixel size used for both

Edit: Is it possible to manually scale webview so i could rescale on popup toggle?

Hey there i am running into an issue where users report that my multisampler cuts any holding notes when playing notes on top of holding note with a PC-Keyboard. (not MIDI Keyboard)

No MIDI scripts running & we use Flex AHDSR Envelope.

Time →  0----1----2----3----4----5----6----7----8----9----10---
       ┌────┬────┬────┬────┬────┬────┬────┬────┬────┬────┬────┐

C5     │    │    │    │    │ ██ │    │ ██ │    │ ██ │    │    │
       │    │    │    │    │ ██ │    │ ██ │    │ ██ │    │    │

G4     │    │    │    │ ██ │    │ ██ │    │ ██ │    │    │    │
       │    │    │    │ ██ │    │ ██ │    │ ██ │    │    │    │

E4     │    │    │ ██ │    │ ██ │    │ ██ │    │    │    │    │
       │    │    │ ██ │    │ ██ │    │ ██ │    │    │    │    │

C4     │████████████████│<-- SUSTAINED BASE NOTE CUT HERE
       │████████████████│                    
       │                │    │    │    │    │    │    │    │
       └────┴────┴────┴────┴────┴────┴────┴────┴────┴────┴────┘

Scenarios tested and works:
MIDI Keyboard
Piano Roll
MAC
WIN Ableton

How to test:
playing key S as base note
arp with G and H (cuts it immediately)

Let me know if anybody has this issue on WIN-FLStudio or has ideas how to approach this.

@d-healey Honestly the expansions only worked without issues when set to AppData folder:

This custom path did not work on my mac expansions.

I have a couple questions:

• Does this "Locate Samples" menu work with expanions?
• We use expansion only - so i assume custom path looks for all exp. content?
• What is the "recommended way" of installing & moving expansions on user side?

Thank you in advance i should probably know more about expansions but i have worked with "baked in" samplemaps most of the time and this is new for me :)