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Apr 4 2009
23:08
annecnozius
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1 How do vocaloid’s dictionary converts words into phonemes?
2 How can vocaloids make sounds
3 How can vocaloids change key, pitch,brightness, and etc inside the computer and how does it know that

Apr 5 2009
12:14
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Hi annecnozius, you obviously want a more technical explanation than I gave previously, so here goes… I hope this makes sense:

1. The vocaloid dictionary is a pre-authored database that assigns a number of phonemes to each syllable in every word in the target language. A phoneme is a sound that your mouth makes when saying words. For example the word "cat" contains 3 phonemes, kh, {, and t (see the phoneme chart in Tutorials section of this site).

2. Vocaloid is a synthesizer. When a Vocaloid character is being developed, all phonemes in the target language are recorded at multiple pitches, as well as transitions between all usable combinations of phonemes. These audio fragments are analyzed and converted into frequency based data, and stored in a database. This frequency database is used during synthesis.
The frequency data for each phoneme is basically a series of resonances (harmonics), which can be shifted over time, allowing phonemes to morph into each other… this allows pronunciation of words.
In the word "cat" the following transitions are needed… silence to Kh, Kh to {, { to t, and t to silence. Also a sustained sound for { is used.

3. Because the audio data is frequency based, the system can change pitch by simply shifting all the synthesized resonances up or down by a musical interval. Brightness can be changed by modifying the relative volumes of the different resonances… eg increasing the volumes of the high frequency resonances brightens the sound.

Does this make sense?

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