Hi there,
as I am just exploring the new upright bass I tried these patches with the EQ.
The vibrating buzz sound you hear is normal for an upright bass when played pizzicato, especially when a note is sustained, the string makes this 'noise' on the fingerboard.
I know this from my Cello and it is normal.
So this is not a problem, it is a real authentic bass sound, and when it appears in an ensemble or a combo it may sound very organic and real.
So we should be happy with it;-)
If it would have been a download problem the installer wouln not have joined your cab files together I guess.
So I think everything is fine with your files.
Once more VSL released an incredible good instrument with a very high quality level, and I guess that other companies have to work hard to reach this level.
christof