Please don't hate me, but I have a pretty harsh critque. ;_; I promise I'm not trying to be mean. *hugs*
I would try to re-record some of the samples. Here's the ones that I can pick out that really bug me. Also, I'm not sure if these are all separate banks, or just a few of the same banks with flags, so bear with me, I'm going according to the 7 different 'people' parts of the song.
First VB:
N
bo
to
shi
wa
i
tsu
ta
2nd VB:
se
3rd Vb:
bo
ALL the r sounds. they're pronounced as l's or a mix between an l and a d.
4th VB:
all the sounds. I really can't understand what she's saying. It sounds really strange and metallic, sorry. ;_;
5th VB:
bo
tsu
ka
ki
se
6th Bank:
The r's again, although this bank other than that doesn't sound very bad at all!
7th bank:
bo
I think the main problem might be your mic, to be honest. What are you using?