Nota bene: this discussion is mainly for advanced UTAU users, this thread topic might confuse completely new UTAU users. I recommend to beginners to read this topic with caution. ===== I have been in UTAU for 4 years now and I have downloaded hundreds of times voicebanks and I have found that people oto VCV differently it. 1) The most common way people to oto their VCV is that if VCV recorded with BGM guide in tempo 100 BPM (many old first VCV VB like Luna or Momo are recorded in this tempo), it has following settings for every sound: Preuttr (red line): 300 Overlap (green line): 100 Consonant (pink area): 450 Blank (blue right area): -600 OR -650 And if recorded in tempo 120 BPM (this tempo is more common in nowadays/newer voicebanks in general), it has following settings: Preuttr (red line): 250 Overlap (green line): 83 OR 83.3 Consonant (pink area): 375 Blank (blue right area): -583 This oto method is super common in VCV because this is the first method that nearly all new users got taught from beginning in Japanese and Oversea UTAU community. Another reason why this method is the most common is that it's super easy, repeating, and very minimal editing of oto is required only (usually fixing timing Offset settings timing is the only thing that is required to do with this method). I think that this method is called as "Universal oto" (please correct me if I'm wrong)! I have noticed that VB that is oto by this method works but it has commonly a weird "accordion" sounding like effect on the sound when moving to note A to B. Other methods what I have find that people oto their VCV is that: 2) They keep the relation between Preuttr and Overlap so that Preuttr is always 3 times huger than Overlap (just like in universal oto) BUT the big difference is that they kept values as minimal as possible. Let's say... Preuttr: 180, Overlap: 60 for example. 3) An another method what I have seen is that relation between Preuttr and Overlap was always that Preuttr is double of Overlap. E.g. Preuttr: 300, Overlap: 150. However, I personally didn't like how this method sounded on VCV. Once I asked on Twitter that why people commonly put ratio 3:1 but not 2:1 in VCV and one answer that I got was that "it's because 3:1 works best and causes the least errors while using". Is this true? Are there big differences between 3:1 and 2:1 and if so how and which is the best overall/in general for VCV. 4) And the last method what I have seen is that there's no any ratio between Preuttr and Overlap on any VCV settings and what they basically do is that all consonant sounds (expect stopping sounds K/T/P) are tightly sandwiched between Preuttr and Overlap like this: And same with method 3), I didn't really like how it sounded and some places the consonant or overlap kinda sounded weirdly off... So, my question is after this long description is that what's the "best" way overall to oto VCV and WHY: What are pros and cons of each 1-4 methods mentioned above? What method soundest the least "accordion" like or otherwise not weird/the least "autotune (is this right word to describe it?)" and does resamplers effect how it sounds? I have heard that UTAU with Universal oto sounds better in Moresampler but I can say nothing on that as being UTAU-Synth user only.