You can read more about it in its wiki, wikipedia, and Ameyas blog.

The program for Windows hasnt been updated again by some reasons since November 2013.

I think Ameya is focusing for UTAU Synth, UTAU program for Macintosh now.

Back to the program itself, UTAU is one of alternatives to VOCALOID; and its a freeware.

I havent tried any other type of voicebanks since I dont like using the quality in between CV and VCV.

But, lets skip about that since you can read all about them in the links above.

I love their voicebanks because they dont sound too heavy, the voice samples quality is great, and multi pitch banks are available.

Honestly, most male voicebanks I found sound like a male trying to sing like a girl; however Matsudappoiyo, Ron, Nazucki, and Yuuma dont sound like that for me.

I fell in love with him in the first sight, or maybe in the first heard.

Matsudappoiyo has been discontinued and access to his voicebanks is also closed.

Im probably biased because of my pure love however I have been using him for years and tried all of his voicebanks, never I found a glitch in his voicebank.

If you have ever tried him then you would know the joy of smooth tuning and rendering without any flags and specific resampler.

Even though I dont use him as often as Matsudappoiyo, hes still one of the best male voicebanks I have ever tried.

I have never encountered any glitch, however its just sometimes he sounds weird in some keys.

Yet, just as similar as Matsudappoiyo, the joy of smooth tuning and rendering without any flags and specific resampler exists here.

You might want to add some flags in some keys, but its not always necessary.

I cant give higher point because the voice isnt exactly the quality what Im looking.

While Vikotoro might be the official nickname, Nazucki is easier to pronounce for me.

Before I found Nazucki I was so desperate to find another decent male voicebank.

Aside from that, Nazucki sounds very amazing in high notes without ruining his image.

I cant give 10 because the voice isnt exactly the quality what Im looking.

For me, the CHAOS one fully represents his voice and character.

I did some minor changes in his oto because he sounded a bit off.

When Sekiya uploaded his demo, I wasnt in frustration to find a decent male voicebank; however, that fleeting feels of receiving a pinch of light in the darkness came again.

Utau-Synth For Mac