I have sixteen gigabytes of RAM. If I lower the Round Robbins meter to use the least amount of RAM, it still uses over five gigs. This is for one choir section. If I want to load all four sections of a choir, I need over twenty gigs of RAM. This is without any instrumentation. Why is Choir Omnia so huge? It's not necessary to sound realistic. What is necessary is good blending between sounds in Omnia's own sequencer (which is mediocre). I'm sorely disappointed in this one. Now, everyone yell at me aggressively to get 64 gigs of RAM.
EDIT: I must make one note, though. If I switch Legato Mode over to Scripted instead of Sampled, the amount of RAM used drops to just over three gigs. That's functional for me, but still big.
EDIT 2: I was looking at the Basses section for the amount of RAM used. The other sections use less RAM for some reason.
EDIT 3: After analyzing the RAM used by each choir section, the Sopranos get a tiny amount compared to other sections of the choir. After listening to each on their most efficient settings for RAM, I must say that the quality I'm hearing is noticeably different between sections. I'm not pleased with this entire plugin.
EDIT: 4 RAM Usage in Gigabytes
-Max Settings-
Basses: 8.69
Tenors: 6.76
Altos: 6.63
Sopranos: 1.34
Total: 23.42
-Minimum Settings-
Basses: 3.02
Tenors: 2.41
Altos: 2.35
Sopranos: 0.60
Total: 8.38