Bob Bickerton wrote:Using just a stereo pair will limit your options to tweak the balance...
I get where you're coming from Bob, but I have to disagree on this point. it's very easy to get a singer to take a step back or forward to adjust the overall balance from a stereo array, if necessary when listening to a rehearsal.
It doesn't have to be a static move either; it's quite possible to ask a vocalist to step in or out for the verse, chorus, single line, or whatever... Or even to turn their head off-mic for a specific word or syllable. Masking tape on the floor helps to mark the desired physical positions, of course, to ensure consistency. :-)
I'm with Sam and Jack, basically. Far too much emphasis is placed on 'separation' and 'fixing' balance issues in post-production, when often 'separation' really isn't a concern at all, and a much better musical performance can often be obtained by 'fixing' any balance issues in the studio before hitting the big red button!