Dear John and Pino.
I suggested SampleRobot because οf the possibility of Auto Sampling, and Auto Looping. That way, we can make our sounds without having much knowledge about the very difficult art of Sampling & looping.
Now what you want to do my friend, is to do Sampling in a sound that comes from VST, then things are much easier, and that's because our sound is ready in terms of color, mixing, etc however i put always a Mastering Compressor with soft threshold and ratio, and a EQ on Master Out of Cubase thus making small corrections to the sound according to my tastes...
SampleRobot lets you choose the length of the note, the length of Looping, etc.
However, personally, when I want to do Sampling from VST, I never do it automatically, even if it has a lot of velocity layers, and that's because I want to be in control of everything (manually looping etc) ...
So, in this case I'm making my own Midi File (for example C, D, E, F, G, A, B) on Cubase 10.5, where depending on the instrument I'm going to Sampling varies depending on how you play the notes and I make Export note by note as wave 16bit/44khz.
For example, I would do a Sampling note by note, wherever you need it, (without the sharp notes), in order not to lose the realism of the real human voice.
If the instrument we wanted was a Synth sound then things are much simpler, and in some cases even a note per octave can work.
But when we talk about all kinds of acoustic instruments (Piano, Guitars, Strings, etc.), then things get quite complicated because much more Samples are required in order not to lose realism.
Finally, friend John, I didn't understand exactly what you were talking about at the end.
I wasn’t talking about Loop but about Looping, which is another art in itself.
All the instruments in Genos, for example, (except Drums) and all the workstation & arrangementrs have been looped where in this way we can keep the Sustain of the sound without requiring huge Rom / Ram space for each Sample. .
And this cannot be done in Cubase but with an Audio Editor e.g. WAVELAB, SOUND FORGE, but also with SampleRobot ...
Of course his real art of Sampling is the one that in a studio you record a real instrument like Guitar, Strings, woodwind instrument, Grand Piano, Drums, Percussion or anything else..
Each different instrument requires a different art in Sampling..
Each different instrument requires a completely different way looping...
For example, a Rhodes sound (like the video), because their harmonic frequencies are few and simple it's too easy the looping point...
However a sound like Grand Piano, Strings etc requires a completely different way looping depending change of the harmonic frequencies, phase and more...
I've been doing this for 20 years ...
I am attaching two of my own videos in which one is a small looping tutorial, and the other on how to make a Muti-Layer sound from the moment of course we already have the Samples ready.
My Tutorial SampleRobot 6 How to create a Multiple Velocity Soundfont (Import to YEM)https://youtu.be/ZmKKLRIxUHk
My looping Tutorial https://youtu.be/ZVka-fVN3Es