Hi and welcome Mr. Mustafa!
You are indeed entitled to download the VSL Jazz Drums for free as soon as you may have purchased and registered Vienna Suite and yes, you will need a Vienna Key (or any other Syncrosoft USB Protection Device for that matter, be it a Steinberg, an Arturia etc...) to store the licenses to the software you purchased on it in order to use either the applications or the plugins!
If you already own and use any other Syncrosoft USB Protection Device, there is no need to buy another one, though!
Vienna Ensemble 2 is a free downloadable application for all our registered users, which means you have to have purchased and registered any of our products in order to have access to it in your User Area on our website.
As of today, Vienna Ensemble hosts our Vienna Instruments exclusively.
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