Masanori Morise (森勢将雅) is an Assistant Professor at Ritsumeikan University. He has worked on Speech analysis/synthesis based on STRAIGHT (Tandem-STRAIGHT) and Voice morphing.


WORLD is a high-quality voice analysis, modification and synthesis system, developed by Masanori Morise. It has been improved by members of the UTAU community. One UTAU voicebank that works best with WORLD based resamplers is  Ritsu Namine.


Hideki Kawahara (河原英紀) and Masanori Morise developed an algorithm called TANDEM-STREIGHT some years after Hatsune Miku was released. The algorithm tries to improve the quality of synthetic speech or singing compared to other algorithms such as Spectral Model Synthesis which is used in VOCALOID.

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