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Please watch in 480p or better while wearing headphones! Otherwise you may have trouble hearing the differences.
A quick little tutorial on using stereo separation to turn regular mono Vocaloid files (technically they're dual mono), into stronger sounding true stereo files.
Demonstration done with Kagamine Len singing PONPONPON
Don't have a stereo widening plugin? Check out these freebies: http://bedroomproducersblog.com/2011/10/28/bpb-freeware-studio-best-free-stereo-enhancerexpander-vstau-plugins/
VSQ by Sango312: http://www.youtube.com/watch?v=09WzxsCGEjY