Try playing MOON on GOLD/TROOPERS AC, turning the pitch effector on, and put it on -4...
Voice sounds exactly like the Sun Mix!
IIDX aside though...
Is it just me, or are they starting to re-use themes?
First Double Rock, then Rock to Infinity...
Geez... GFDM isn't just about Rock, and I think that's what makes it better than other similar music games (no offense to anyone :3)
Would be surprising though if V6 was Jazz something...