>>10697109That's hard to do without getting off topic or starting a timeloop, so I'll just describe what the clock ISN'T and you can fill in the rest in some other thread:
Every Holo will sound good when recorded, because they have infinite takes and audio engineering hax. As long as they're generally good at speaking (and if you're not good luck getting a callback from Cover), there's gonna be enough raw material to make a good track.
During livestreams, however, the girls' individual abilities come out, and the main two things that separate talking and singing are Rhythm and Pitch.
Mori's got a knack for both, and has practiced enough with them for the sake of rapping that she's achieved a baseline level of comfort that can be applied to any song or situation.
Casuals and threadreaders will never know how good Mori's rhythm is because of the goddamn defective GoXLR ruining the first few dozen chances they had to hear it, but even there she's incredibly CONSISTENT in how behind or ahead of the beat she is. Nothing short of Battlecry can trip her up, which says just as much about her innate feel for the beat.
Her use of pitch is quite a bit more hamstrung thanks to whatever bitch told her she couldn't sing, but even then in just a year she's managed to get to a point where she can nail even some really bare sections live, like GHOST and End of a Life. I think a lot of that comes from her rapping style which compensates for lack of brute force with finesse, using tiny shifts up and down in pitch to needle away at your ears with her little white girl voice.
I don't know how much of all that comes from talent, being raised by performers, or sheer effort, but it's an entirely different set of skills from what it takes to, say, mimic a whole bunch of different anime voices (which Mori is dogshit at), so that might be leading to the wide gulf between other streamers' oratory/narration voices and their singing voices.