Ive never come across this problem before, but essentially ive taken some sound clips and exported them as .wav files in audacity. yes they are microsoft 16-bit samples. I moved them to my voicebank's folder, then opened up UTAU like normal and had the VB play the new notes, except nothing came out. I checked the oto editor and to my surprise, there was no sound file there. Its as if UTAU was unable to read the sound file i used.
I've added a screenshot of what it looked like when opening up the oto editor.
I've added a screenshot of what it looked like when opening up the oto editor.