Frequently Asked Questions

License & Activation

The S427 Control Center is the application to use whenever you need to manage your licenses, whether online or offline. CC also enables you to promptly verify for updates and download your products.

S427 Control Center allows you to:

  • Activate or Deactivate licenses for the current computer or an offline one
  • Download the license files of activated licenses
  • Add third party licenses
  • Discover and download our products

→ Download the Control Center App

At first, it's important to distinguish between the Activation and the Installation of a license.


Activation makes your license active for the current computer in your Studio427Audio account. The number of available activations may vary based on the product; some licenses offer multiple activations, while others provide only one. For instance, if a license allows three activations, you can activate it on up to three different computers simultaneously. There are no restrictions on how many times you can activate a license on a single computer.


Once a license has been activated, it's necessary to install the corresponding license file. Without this file, your product won't be able to authorise properly.

This installation process is straightforward and can be completed using the S427 Control Center app.


→ Download the Control Center App

Naturally, the S427 Control Center enables you to install your licenses on offline computers as well.

However, please bear in mind that you will still require access to an online computer to activate the license.

This implies that you need to install the S427 Control Center on both online and offline computers, and transition between the two using a portable drive.

The process is explained in detail in the FAQ section below.

The process of transferring a license to another individual is free of charge.

However, a license cannot be transferred within the first 6 months from the date of purchase.

Once a transfer request has been submitted and completed, it is irreversible. The previous owner will permanently lose access to the license until a new one is purchased.

To initiate a license transfer, please use the contact form and choose the "License transfer" option. We will review the transfer request and respond to you before proceeding.

Typically, a single license allows activation on up to 3 (three) computers simultaneously. However, certain products, such as Align-IT, can only be activated on 1 (one) computer at a time.

If additional activations are required, kindly consider acquiring a new license.

In the Control Center app, you can easily see and manage your licenses and computer activations.

Demos & Freebies

Because our plugins/apps need to validate the demo license expiry, they require the computer to be connected to the internet at startup.

Once the product is authorised as a demo, an internet connection is no longer necessary until you close and restart the plugin/app again.

If you don't plan to connect the machine you intend to use for trying a demo license, we recommend considering the purchase of a standard license.

First, be aware that products activated under a demo license necessitate an internet connexion

When available, our product demos are offered at a cost of 0 (zero) euros. This process of buying a demo license involves creating an account, to which the demo license is then appended. Subsequently, utilise our Control Center application to link to your account and activate the demo license, following the same procedure as for non-demo licenses. The Control Center app facilitates the download of our products.

It is important to note that not all products offer a demo license.


Typically, a demo license is restricted solely in terms of time (e.g., 30 days, although this duration may vary).

Certain products may impose functional limitations as part of the demo, along with the presence of sound artifacts or unpredictable MIDI responses.
Should you wish to access these functionalities, we recommend considering the purchase of a full license.

The sole method to remove a demo limitation or expiration notice is to acquire a full license. Upon obtaining a full license, you can typically activate it using the Control Center application. This action replaces the previous demo license with the newly acquired full license.

As our free products do not require the acquisition of a demo or full license, you can directly download them from the resources page on our website. Consequently, and since there is no activation required before using the free products, there is no absolute need to utilise the Control Center application although you can.


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Payment Methods

We currently provide three payment options for purchasing our products:

  • Standard PayPal transfer
  • PayPal in 4 instalments
  • Credit card


We exclusively accept the specified payment methods and do not accommodate any alternatives.

Studio 427 Audio is registered in France under the Auto-Entrepreneur or Micro-Entreprise status. According to Article 293B of the CGI, this specific status does not permit us to levy VAT. Consequently, the price you pay, whether you are an individual or a company, does not include VAT and represents the final amount to be paid.

In adherence to French law, invoices issued under the Micro-Entreprise status must include the statement "VAT not applicable, art. 293B of the CGI".

This implies that:

  • The VAT is non-refundable by us, as it is not included in the price.
  • You do not have the option to purchase a product from us with deducted VAT.

art. 293B of the CGI:

Download & Installation

To download the product you've purchased or demo products, utilise the S427 Control Center application with the following steps:

  1. Connect to your account.
  2. Click the download button located in the left panel.
  3. Select and download your selection.

After the download completes, you will locate the files in your download folder.

Following the download of the products using the S427 Control Center or from your online account, locate the files in your download folder.

Installation procedure:

  • Navigate to your download folder.
  • If necessary, unzip the product installer.
  • Double-click on the installer to initiate the installation process and follow the steps.

Upon completing the installation procedure (and, when necessary, the license activation through the Control Center), the plugin should be accessible in your DAW after a restart. If you are unable to find the product in your plugin list, please consult the Troubleshooting section of this FAQ below.

Standalone products should be immediately accessible from your usual Application or Program folder.


Given the diminishing prevalence of 32-bit environments, Studio 427 Audio products exclusively support 64-bit operating systems.

Our products are compatible with macOS versions from 10.15 Catalina to macOS 14.3 Sonoma.

Our products are compatible with Windows versions from Windows 7 to Windows 11.

Typically, our plugins are offered in AAX, AUv2, and VST3 formats.*

In addition to these plugin formats, certain products may also be accessible, sometimes exclusively, as standalone applications.

* To obtain detailed information regarding a specific product's format and compatibility with operating systems, please consult the bottom section of the product page.

For macOS 10.13 High Sierra and newer, AU plug-ins may not immediately show up in your host software after installation. In such cases, please perform a complete reboot of your Mac. Upon relaunching your host, the new AU plug-in(s) should become visible.

Many host applications cache plug-ins to enhance loading speed and avoid re-scanning each plug-in on startup. It is likely that you will need to clear your host's plug-in cache so your plug-ins will be re-scanned.

Here are examples for specific host applications:

Apple Logic Pro X:
On macOS versions prior to 10.13 High Sierra:

Go to Preferences > AU Manager.
Select the plug-in(s).
Choose Reset & Rescan.

If the above fails, quit Logic and follow these steps:

Navigate to /Users/YOUR USERNAME/Library/Caches/AudioUnitCache/
Delete the file

Restart Logic.

Cockos Reaper:
Go to Preferences -> Plug-Ins -> VST
Select Clear cache/re-scan.If unsuccessful, quit Reaper and delete the following files:

in ~/Library/Application Support/REAPER/:

in C:\Users*USERNAME*\AppData\Roaming\REAPER\VST:

Restart Reaper.

Ableton Live:
Go to Preferences -> File/Folder -> Plugin Sources:
Turn on Use Audio Units and/or Use VST Plug-In System Folder.
If already turned on, perform a rescan by holding down the ALT key and clicking Rescan.

AVID Pro Tools:
Depending on your operating system and Pro Tools version, manually delete the following files:

macOS with Pro Tools 11+:
Macintosh HD/Users/USERNAME/Library/Preferences/Avid/Pro Tools/InstalledAAXPlugIns
Macintosh HD/Users/USERNAME/Library/Preferences/Avid/Pro Tools/Pro Tools Prefs

macOS with Pro Tools 10.3.6+:
Macintosh HD/Users/USERNAME/Library/Preferences/DAE Prefs

Windows with Pro Tools 11+:
C:\Users*USERNAME*\AppData\Roaming\Avid\Pro Tools\InstalledAAXPlugIns
C:\Users*USERNAME*\AppData\Roaming\Avid\Pro Tools\Pro Tools Prefs.ptp

Windows with Pro Tools 10.3.6+:
C:\Users*USERNAME*\AppData\Roaming\Avid\Pro Tools 10
C:\Program Files (x86)\Avid\Pro Tools\DAE\DAE Prefs

Steinberg Cubase:
Try going to Devices -> Plug-In Information.
Select Update Plug-In Information.

If that fails, quit Cubase and delete the following files:

in ~/Library/Preferences/Cubase/:
Vst2xBlacklist Cubase.xml
Vst2xPlugins Cubase.xml

in C:\Users*USERNAME*\AppData\Roaming\Steinberg\Cubase:
Vst2xBlacklist Cubase.xml
Vst2xPlugins Cubase.xml

Restart Cubase.

If you face challenges while attempting to connect in the Control Center, check the log panel in the bottom-left for any information or connection reports that could offer assistance.

If the log does not furnish sufficient information, consider the following steps:

  • Attempt to connect to your account through the website.
  • Retry at a later time, as our server may be temporarily inaccessible, such as during maintenance.
  • If you have forgotten your password, please create a new one on the website's login page.
  • Verify your internet connection.
  • Ensure that there are no firewalls that could potentially block the Control Center application.

Account & Orders

You can easily change your password by going to your account, then under Account Info.

As our products are distributed using a licensing system, it is essential to have an account for license management. Consequently, an account will be created when you make a purchase of our products in the case you don't own one already.

Contacting Us

If you haven't obtained a response from us, kindly inspect your spam/junk directory, as certain email providers may incorrectly categorise our messages as spam. To ensure the delivery of our emails, consider adding the following email addresses to your whitelist or list of trusted contacts.



To receive a solution to your issue as quickly as possible, please refer to the FAQ above.
If you’re unable to find what you’re looking for, we’ll be more than happy to assist you to the best of our abilities.

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