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| Where to place preutterance and overlap; And where to not place them | |
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| Tweet Topic Started: Jan 4 2012, 07:42 AM (1,060 Views) | |
| tady159 | Jan 4 2012, 07:42 AM Post #1 |
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lol...
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I have seen that many people when configuring a VB, most of the time can figure out how to place offset, consonant, and cutoff correctly. But then, when they reach the so called red and green lines, they stare at them, and go "Ok so... Where do I put them?" This post is about this. First, lets name them properly: The red line is the preutterance; the green is the overlap. What each one does? Preutterance will displace anything that goes BEFORE it, so it will be pre-uttered before the note is executed. In CV configurations, this will make the consonants to ALWAYS be "out" of the notes. (By "out" I mean that they will be on the little "extension" that happens on the left of the envelope) Overlap will make the previous note blend with the are between the offset and the overlap of the note. If overlap was set to zero, no blending. But I will explain when blending is needed. So... Okay, all this talk, and WHERE to put them? The preutterance will ALWAYS go exactly between the consonant and the vowel (exception: VC samples), so you simply drag the red line exactly to the transition between both. Consequence: no consonant, no preutterance. This means that vowels (and the isolated "n") will not have preutterance set on them. Then you ask "so HOW do I make the vowels blend?!" UTAU has an automatic crossfade tool for this. And one more point: If you set preutterance to vowels, they WILL sound displaced, no matter how much you set to them. The overlap is dependent on the preutterance, and is a bit more delicate. I already tried more than one way to set it, and the only one I found that works properly was to set the overlap more or less at the hald of the preutterance (example: if preutterance is 100, overlap will be 50). Why: If the overlap is too much smaller than half of the preutterance, it will sounds choppy. I actually can't explain very well WHY, but I suppose that it is because it will cut the previous note too early (note: VCV is exception in this case). If it is beyond the half of preutterance, it will have two negative effects: the clean consonant will be too short, and this may happen: [direct link to the image if it doesn't show] In this picture, the overlap was set in a value so close to the preutterance, that if vollowing a short note, it will completely overlap it, and even go beyond the beginning of it. Of course, this is not a desired effect. Consequence of overlap depending on the preutterance: If no preutterance is set, the overlap will also be zero. So, vowels also will not have overlap set. Ok. So, in WHICH consonants should I set overlap? The answer is quite simple: long consonants. But if this is not clear enough, I will list them. The long consonants, that will need overlap are: s; sh; z*; j*; ch*;ts*; n; h; f; m; y; w. * those consonants, technically, would not need the overlap, since they start with a stopped consonant ("t" or "d", in the case of those). BUT if no overlap is set to them, they will cause some choppiness. By overlapping them, there is not much of a bad effect o nthem. So, to finish this post, I'll give some examples of where to NOT place preutterance and overlap. Overlap should NEVER be set at a higher value than preutterance. Because this will make the previous note overlap the WHOLE consonant, and also falls on the effect of the high overlap. Preutterance should NEVER be placed BEFORE the consonants (exception: VC samples). This is not very noticeable with shorter consonants, like "t" and "g". But if the consonant is larger, like "s", its displacement is very noticeable. Preutterance should NEVER be set at the END of the sample (exception: VC samples, and ending vowel sounds). What is the point of displacing the whole CV sample? [If you think this is too absurd, I actually already saw someone who did this] Aaand... I think that is it. Quite large post, but I think this helps people. Any doubts, please ask ^^ Edited by tady159, Jan 4 2012, 07:44 AM.
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"To never look back."
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| Tala | Jan 8 2012, 02:31 AM Post #2 |
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Hhm, this is almost the same way as I oto xD *shot* I just don't take the Overlap this far in, it's a bit shorter. I think it sounds a bit .... well... slurry xd Also when I oto vowels, I take the beginning of the note (the blue Bar) and take it a bit more to the middle, so you cant hear the beginning of the sample. Then I set Overlap to 20~50 or something like this :D I hope you can understand what I was saying xd |
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| tady159 | Jan 8 2012, 05:38 AM Post #3 |
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lol...
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As I said, to set preutterance on vowels will make them sound displaced when singing. And to set overlap at any value higher than the preutterance (even if preutt is set 0), is incorrect, and the voice bank check will report an error on configuration when loading the VB every time. |
"To never look back."
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| Doj | Jan 11 2012, 04:22 AM Post #4 |
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The "n" consonants, you mean the "na ni" etc. and not the "n" standalone? I normally leave preutterance/overlap/consonant area out of my vowels, and I consider the standalone n and m vowels. |
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| tady159 | Jan 11 2012, 05:09 AM Post #5 |
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lol...
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Yes, standalone "n" and "m" are considered vowels. But if you leave the consonant area out of the vowel, its beginning will also be stretched, and this is not desired. |
"To never look back."
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