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As a result, Moresampler is a lot more flexible in resynthesis, both in in changing the pitch and duration. The resynthesis doesn't need to refer back to the original audio. Moresampler performs spectral analysis on the harmonic and inharmonic audio, as well as the vocal pulse.
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Most UTAU resamplers use crossfades and standard pitch transposition techniques to reassemble the phonemes from the source audio files. He developed his own resampler (resynthesis engine) for UTAU called Moresampler, which is different from most most resamplers available for UTAU. You may be aware that Synthesizer V actually grew from Kanru Hua working on tools for UTAU. That makes it a lot easier to tune a word, and even work around errors in the voicebank. One nice thing about Synthesizer V is that you have sliders for each phoneme at the syllable level. But working with voices requires a lot of low-level tweaking.
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UTAU is cool, especially since you can build your own voicebanks. even when I had that much money to spend. The Dex and Daina voicebanks focus on a more American English accent, and I was toying with the idea of buying the full editor, but I wasn't terribly impressed by the demos, and the price of the full Vocaloid editor always priced me out of the market. Vocaloids tend to have accents, and the resynthesis process only magnifies that. I was interested in Vocaloids a few years ago but the software was very expensive and all of the voicebanks were Japanese so English pronunciation was a problem
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