Im new to utau, and im trying to make a cv voicebank, i already put the wav files into a folder and even put that folder into the singers folder of the utau software, it only contais some wav files of the japanese alphabet, it's not full thou, and when i go into project settings and i click the 3 dots and i select the folder that contain those wav files, when i click in ok, only the "a" note make sound, the other notes, i, u, e,o... don't make any sound, why is that happening? Someone please help me