I'm a new user - so this is all baby stuff (perhaps).
First - In my generation, the Vibraphone had adjustable vibrato. I often write Vibraphone parts which feature faster or slower vibrato. Think of those Bernard Herrmann film scores (Journey to the Centre of the Earth, TDTESS) where there are two vibraphones set at different rates of vibrato. A vibraphone without it is simply a glockenspiel with a bad cold on steroids. How does one put the vibrato back into the vibraphone.
Second - string ranges. How can one extend string ranges. For example, violins quite normally go up to the 4th E above middle C, and as high as the G or A above that - the E's a natural harmonic (think of the very last note of Scheherazade). The string set here goes only to the D just below it. I'm writing a cello concerto right now and I need some of those higher notes.
Ditto with other strings.
Is there a set of samples for voices - solo voices, chorus? If not, it's a must especially for those of us who write for chorus, soloists w/wo orchestra.