Studio VOXYZ was founded in 2009 as Project UTAU XYZ by MystSaphyr, the voicer of the UTAU Kikyuune Aiko.

The studio name acts as a voicebank series and music label, and aims to promote the use of character-based singing synthesizers.

This site hosts downloads, media and information for VOXYZ voicebanks and related projects.

What are singing synthesizers?

Singing synthesis is exactly what it sounds like: software intended to replicate the human singing voice. This website deals with all manner of vocalsynth software, but it primarily tends to focus on UTAU and VOCALOID. Other synths include DeepVocal, CeVIO and Synthesizer V.


  • VOCALOID is singing synthesis software created by Yamaha.
  • Third party companies produce “voicebanks” for the software, which are purchased individually.
  • To use VOCALOID, you add notes in a piano roll interface, and type in lyrics.
  • You can edit (tune) parameters such as pitch, vibrato and dynamics to make the voice expressive.
  • The most well-known VOCALOID is Hatsune Miku (初音ミク)
  • Miku’s popularity is why most vocalsynths have character avatars as a marketing technique.
  • As of 2021, there are over 70 voices available for the VOCALOID software, and the software is currently on its 5th iteration.

What is UTAU?

  • UTAU is freeware Japanese singing synthesis software.
  • UTAU “voicebanks” (“ongen/音源” in Japanese) are folders containing recorded voice samples.
  • Like its predecessor VOCALOID, the UTAU software also uses a piano roll interface.
  • However, due to its programming limitations, UTAU input is phonetic with no preset dictionary.
  • The term UTAU (or “UTAUloid”) can refer to an individual voicebank, which is usually represented by a character avatar, thanks to the influence of VOCALOID.