I have been receiving conflicting information from orchestration bigwigs. Some say that composers should never orchestrate two stringed instruments together because they will be ever so slightly out of tune with each other. But then there are compositions like Vivaldi's Violin Concerto Op 3 No 8 that have two violins playing in unison. What's the scoop?
Okay there seems to be confusion as to what I mean. I have read that for smaller ensembles, one section of stringed instruments should either consist of one or more than three because only two stringed instruments playing together would sound out of tune. Is that true?