Thanks. As far as the sound is concerned, all the credit surely goes to the VSL team, but if you are referring to the additional sound capabilities owing to the continuous control then your comment is much appreciated
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Your question is not stupid at all. For live playing key-switches are very convenient. Yet, as you mentioned, they come with the downside that keyboard keys are limited (and far from being sufficient for the huge VSL sound content) ... and above all key-switches mess up the score.
A main goal of Articulate Presets was to turn the Vienna Symphonic "Library", with dozens of folders and sub-folders of patches, into an "instrument" where all sounds are at your fingertips and you can quickly and easily access all the content by sending program change messages and continuous controllers from your master keyboard. Program change messages are an integral part of the MIDI standard and all master keyboards as well as many digital pianos can send them (many keyboards can also send program up/down commands that let you step through the list of articulations) - please see the documentation of your keyboard on how to do this.
When it comes to live playing, entering a program change number can take a bit too long in fast passages with lots of articulation changes (yet, depending on how efficiently program change messages are handled by your master keyboard, this can still work). There are several ways to overcome this:
Firstly, Articulate Presets try to minimize articulation switching by combining as many articulations as is possible (and musically reasonable) in a single matrix: try e.g. the universal interval matrix (PC24) for live playing, which includes most of the available performance interval patches (legato, marcato, spiccato, trill) and allows you to play very diverse musical lines while merely moving the modwheel.
Secondly, there is a wealth of (inexpensive) MIDI hardware and apps for smartphones and tablets that allow you to assign program change messages to a range of buttons, drum pads, ..., to quickly access different articulations. Moreover, in the dedicated VI pro App for tablets you get a scrollable list that allows you to select all matrices (and send the corresponding program change messages).
Finally, in Logic, which offers the required MIDI transformation capabilities, an advanced key-switching solution will be available soon. Key-switches are transformed into the appropriate program change messages before they enter the sequencer - and will thereby allow the user to quickly and conveniently select all 128 matrices by key-switches (via the novel concept of articulation banks). Here is a sneak peek showing the complete integration of Articulate Presets directly into Logic's main window:
As far as I know, Cubase does not offer the required MIDI capabilities to implement something like this, so there are no such plans for Cubase at present. Maybe an external MIDI tool could offer a similar solution for other sequencers (including Cubase) in the future.
(Adding additional (ordinary) key-switches for your most often used articulations directly in VI pro is in principle also an option for fast articulation selection while playing. In this case program change messages still work and there are simply two alternative ways to select an articulation. As discussed above there are definitely better ways to select articulations, that don't affect the score, but I don't think that doing this would defeat the purpose of these presets.)