We many know that some UTAUs are more easier use than some another UTAU even if exactly same script (recording list), recording tempo and (nearly) same recording equipments etc.
For example, in my opinion Yamine Renri sounds very good in default: even in minimally tuned or in not-tuned UST, she sounds very fine (I'm not saying that she doesn't need any tuning but there are some UTAUs like Meiji, Ruko or Ritsu Kire that actually NEEDS more tuning/tweaking to sound as fine).
What are the factors of "easy-to-use" and "natural sounding" UTAU?
Please, try to answer something else than "it's because VCV/multipitch", there must be other factors as well!
For example, in my opinion Yamine Renri sounds very good in default: even in minimally tuned or in not-tuned UST, she sounds very fine (I'm not saying that she doesn't need any tuning but there are some UTAUs like Meiji, Ruko or Ritsu Kire that actually NEEDS more tuning/tweaking to sound as fine).
What are the factors of "easy-to-use" and "natural sounding" UTAU?
Please, try to answer something else than "it's because VCV/multipitch", there must be other factors as well!