Frequently Asked Questions

Just installed the newest update of your AU plugin, and I cannot get it to open in Logic Pro X and/or GarageBand

Try deleting the Kuassa AU plugin (PluginName.component) from “/Library/Audio/Plug-Ins/Components” then try re-install again. Now it should appear and work ok.”

Plugin asks for authorization everytime I run it.


Right-click on the shortcut to the DAW, and select “Run as Administrator“, then import the License(s) from that instance of DAW. You only need to do this once (you don’t need to Run as Admin every time)



Manually copy/paste & overwrite the license file you downloaded to “AmplifikationVermilion Files” folder on the same path with your *.dll plugin. Do the same with Creme, to “AmplifikationCreme Files”folder. For example, if your plugin is installed to:

“C:/Program Files/Steinberg/VstPlugins/Kuassa/AmplifikationVermilion.dll”

copy the license file “AmplifikationVermilion.kuassa” to:

“C:/Program Files/Steinberg/VstPlugins/Kuassa/AmplifikationVermilion Files/AmplifikationVermilion.kuassa”

For 32-bit plugins, the default folder is in: C:/Program Files (x86)/


Mac OSX:

Copy/paste & overwrite the license file, for example “AmplifikationCreme.kuassa” to:

“/Users/[your user name]/Library/Application Support/Kuassa/AmplifikationCreme/AmplifikationCreme.kuassa”

 Note: in OSX 10.8 and above, the User Library folder is hidden. Click on “Go” on the menu and press+hold “Option” key to show the Library folder on the Go Menu

I cannot open the license file, the file extension is not recognized by any application.

You can use the license file to authorize a demo version of our plugins which can be downloaded from here. Here are the steps to authorize the plugin:

  1. Right click on your license download link, select “Save Link As” or “Save Target As” (depends on your browser)
  2. Do not rename the file, save the file as “[ProductName].kuassa” to an easy to remember folder, usually Downloads or Desktop
  3. Open your DAW, load the product in any point, Click on [FILE] button on the top left corner and select “Import License

4. Select the ‘[ProductName].kuassa‘ file that you downloaded, and you’re ready to go.

(OSX) Downloaded preset cannot be opened, it’s greyed out.

It’s a permissions problem from the OS. Please try the following steps to fix it:

  1. Start a Terminal session from Applications->Utilities->Terminal
  1. Navigate to the preset(s) directory, write this command: cd YourPresetFolder

Example if you put the preset on the desktop write this command: cd desktop

  1. Write this command to change the preset(s) permissions, .kvp extension for Amplifikation Vermilion preset is used as example: chmod 666 yourpresetname.kvp

or if the preset name uses space(s), please use quotes (“) on the preset name: chmod 666 “your preset name.kvp”

or this command to change all available presets on the directory: chmod 666 *.kvp

(OSX) Plugin does not appear on the DAW

Copy the plugin files (*.component) from: Macintosh/HD/Library/Audio/Plug-Ins/Components/

and paste to: Macintosh HD/Users/[your username]/Library/Audio/Plug-Ins/Components/


Do the same for VST plugin (*.vst) from : Macintosh HD/Library/Audio/Plug-Ins/VST/

and paste to: Macintosh HD/Users/[your user name]/Library/Audio/Plug-Ins/VST/


Then, move the license file [ProductName.kuassa] to the corresponding location:

“Macintosh HD/Users/[your user name]/Library/Application Support/Kuassa/[ProductName]/[ProductName].kuassa”

(OSX) Audio Units validation failed / not detected on an old project

  1. Delete “[pluginname].component” from this directory: “Library/Audio/Plug-Ins/Components/”
  2. Open your Host/DAW
  3. Make sure that the plugin is not listed anymore on your Host/DAW’s plugin list. This is to make sure that you deleted the correct plugin on a correct folder
  4. Close your Host/DAW
  5. Install the new plugin version. Make sure you downloaded the correct version on

Particularly for Logic Pro users, if the method above still don’t work please try this workaround:

  1. Go to folder “~/Library/Caches
  2. Remove the “” file.
  3. Remove the ~/Library/Caches/AudioUnitCache folder


I installed your product's demo for Windows, but it's only a single file (.dll/.vst/.component) and I don't find the executable file needed to run the product (.exe/.app) file.

Our products is a VST/AU compatible plug-in for Mac and PC. Therefore, you will need a VST/Audio Units compatible host/sequencer software to use it, imagine it as a software running within a software.

Here’s the wiki about VST Plug-in
And here’s the wiki about Audio Units

New 64-bit Mac AU plug-ins validation failed

This issue happens randomly due to the permission settings the installer not automatically set the plugins to “read&write” on some systems.

to fix this, please go to Library/Audio/Plug-Ins/Components/[PluginName].component and open “get info”.
And change all the permissions to read & write (see attached picture below)

Under which Operating Systems do the plug-in work?

32 and 64 bit version Windows XP or Later, Mac OS 10.5 or later.

Native VST only. No DirectX, no RTAS, no TDM, no AAX at this time.

Can I use your plug-in work with Pro Tools?

We do not provide RTAS, TDM and AAX format but you can use “VST-RTAS Adapter” to run the plug-in on Pro Tools. Anyhow, we do not provide any support for the wrapped plug-in.

Do your plug-in compatible with 64-bit version of XP/Vista and Windows 7?

Yes, it is. But it doesn’t utilize the 64-bit calculations, unless if you were using a 64-bit DAW.

Whenever I load your guitar amp plugin onto my DAW, I get high pitched squealing and/or distortion

A few number of DAWs always read both stereo channel and apply the effects even if there’s no signal on the input, for example: Sonar (Win) and Logic (Mac). On the top left of the plugin window, click on “IN” button and select only the Left Channel [IN-L]

Why your plugin failed the AU Validation on Logic/GarageBand?

sometimes it happened randomly due to the permission settings the installer not automatically set the plugins to “read&write” on some systems.

to fix this, please go to Library/Audio/Plug-Ins/Components/AmplifikationCreme.component and open “get info“.

Then change all the permissions to read & write (see attached picture).

Can the preamps/cabinet sims etc. be deactivated, so one could use only the amps, the FX or the cab sim of Amplifikation One/Creme/Vermilion on its own?

Yes all units have its own on/off switch so you can only use the unit/s (fx, amps and cabinets) separately.

Why there's a weird popping noises from the plugin when I change preset? is that a bug?

a popping or clicking noises are occured due to the realtime calculations inside the amp, but on most guitar recording session this kind of noise won’t be a problem after your tone are set.

Do your plug-in use some kind of copy protection?

Yes, we are using a “License Key” method (e.g. AmplifikationOne.kuassa) to authorize our products you will need a valid license file by purchasing it in this website.

How do I authorize the plug-in?

When you bought our products, you will receive a payment receipt via the e-mail address you provided at our website’s store page. You will be given a link to download the license file with registration details, simply locate the License File using the [Import License] selection box located at the [File] button on the upper-left corner. For instruction details, please refer to the Authorization Section of the corresponding product’s user manual.

jThe plugin won’t authorize in Logic Pro

Please try to do the following:

Copy the license file and paste on the following direcory:
OSX: “Music/Audio Music Apps/Kuassa/Licenses/” or in full path “Macintosh HD/Users/[your username]/Music/Audio Music Apps/Kuassa/Licenses/”

If Somehow Vermilion Is Installed But Not Appear In Logic
Uninstall Vermilion
By default, OSX hides the user /Library/ folder, to open it : Open Finder, click on ‘Go’ on the menu bar and hold ‘Alt’ button. There will be a new ‘Library’ menu selection.

Go to Macintosh HD/Library/Audio/Plug-Ins/Components/ and delete “AmplifikationVermilion.component” file.
Open Logic, go to “Preferences -> Audio Unit Manager”, and see if the plugin is removed from there.
Download the latest version and reinstall the plugin

If the above method didn’t work, try to rebuild the AudioUnit cache:

Open Finder, click on ‘Go’ on the menu bar and hold ‘Alt’ button. There will be a new ‘Library’ menu selection.
Click on ‘Library’ and browse to ~/Caches/ folder
Delete ‘’ on that folder.
There could be a folder named ~/AudioUnitCache/ there, delete that folder as well.
Restart your Mac and run Logic to rebuild the AU caches.

My plugin(s) will not stay authorized!

Right-click on the shortcut to your DAW, and select “Run as Administrator“, then import the License(s) from that instance of the DAW.
You only need to do this once (you don’t need to Run as Administrator every time)

Windows (Alternative):
Manually copy and paste, then overwrite the license file you downloaded to “ProductName Files” folder on the same path with your *.dll plugin.
for example, if your plugin is installed to:

“C:/Program Files/Steinberg/VstPlugins/Kuassa/AmplifikationOne.dll”

copy the license file “AmplifikationOne.kuassa” to the folder:

“C:/Program Files/Steinberg/VstPlugins/Kuassa/AmplifikationOne Files/”

Mac OSX:
Copy and paste, then overwrite the license file, for example: “AmplifikationOne.kuassa” to the folder:

“/Users/[your user name]/Library/Application Support/Kuassa/AmplifikationOne/”

My system said that the plug-in could not authorize

Check if you have activated the plug-ins using the correct method written in the corresponding user manual, or there might be a connection problem when you are downloading the license file. Please write to us at:

How do I get the plug-in re-authorized after reinstalling or formatting my system disk?

We recommend you to securely backup your License File received after your purchase, since the License File download link will be expired after 1 week since the purchase date. If something happened and you need to retrieve your License, contact us at and we will give you new download link.

Is a demo version available?

Yes, you can download and use it for trial purpose. The plug-in is fully functional without time or feature limitation, but will generate noise or silence every 40 seconds in evaluation mode.

What is your update/upgrade policy?

Upgrades means, for example: the Kuassa Amplifikation One will be replaced by a new version. e.g. Kuassa Amplifikation TWO.
An upgrade price is only applies if you want to upgrade from Kuassa Amplifikation ONE to Kuassa Amplifikation TWO which will have significant improvements in term of features and overall value. The upgrade price will be lower than a new purchase.

About updates, at this time our products is reaching version 1.x.x which are free for the owners of version 1.x .

I bought Kuassa product from other than here (i.e. resellers) and received a order ID/code. How to get the license?

Starting October 2015. We sold our products through many of reputable online resellers. There, you will receive an [Order ID] which should be redeemed through our member area. Here’s how:

  1. Download the installer here:
  2. Create a user account at:, then our system will send an e-mail to you to activate the account
  3. Login to your Kuassa Member Area
  4. Click [Register New Product], then enter your [Order ID]
  5. The product will shown along with the license file’s [Download] button
  6. Download the license file, then use it to activate your product
  7. Visit: for more detailed info, or e-mail us at

Do you offer crossgrade pricing for Rack Extensions for those who own the VST?

Yes, we offer crossgrade discount for customers who wanted to crossgrade from/to Rack Extension. Just e-mail us at and please include your order number/payment receipt so we can verify your ownership. Then, we will send you a coupon code to deduct your final price.

I downloaded the file: ProductName.kuassa from e-mail I received from Kuassa after completing my purchase, but when I attempt to open the file, or double-click the file, it says there is no association for the file.

The file: “ProductName.kuassa” is a License File needed to authorize the product. You need to install the plugin first from our download page, run the product using VST/AU compatible host/sequencer software. and authorize the product using the [FILE] button on the top-left of the product’s interface

Where can I get the user manual?

User Manual are located on the folder when you installed the plug-in. Or you can access it by clicking the [FILE] button on the upper-left, and choose [User Manual]

How do I contact for support or report problems to?

Please write us a an e-mail to our technical support dept. at:

Our office is operating on Monday to Friday, at 12.00-20.00 UTC/GMT +7. Our typical response time is 1 to 2 day(s) after you send the support request, can be faster on weekdays, and can be slower on weekends.

Can I get a discount?

For bulk orders, we could arrange special order. Please write to our sales dept. at: or wait for our promotional programs in the future.

What the $@#*! is VAT? and why am I being charged for this?

We, as a Non-European Company are required to collect Value Added Tax (VAT) on sales of electronically delivered merchandise and services to customers living in the Europe. Basically, it’s a form of consumption tax on the purchase price collected by European Governments.

You can read more about VAT here: