I made my own reclist, and in hindsight, it looks a lot like
Delta reclist CVVC number 7. We use the same alias, which is X-SAMPA. You can use
https://tophonetics.com to translate English words to X-SAMPA. I do not like CZ's VCCV because it is not non-native friendly. It is hard to know how to make the ust of the English words. While X-SAMPA is based on the IPA, the international phonetic alphabet, which is what the academic world and professional linguists use. Arpabet (The alphabet in Arpasing) is also academically used, but it is more specific to English and has fewer sound expressions. It is easy to find the equivalence of Arpabet to X-SAMPA though.
The difference between my reclist and Delta reclist is that my reclist is even more cut down. My reclist has no diphthongs and consonant clusters. I also only use the 10 vowels. In Delta there are 14 vowels, I don't have these 4 vowels: v+ (V), u+ (U), 3, and ju. And lastly, I only oto the CV parts. I'm not a native speaker, the reason why my reclist is so minimal is just because it is hard for me to pronounce them.
Here are some samples:
Lose Somebody by Kygo, OneRepublic
You'll Always Find Your Way Back Home by Miley Cyrus
You Belong with Me by Taylor Swift
I do not use BGM when recording, because it makes me feel rushed and I'll fail to pronounce correctly. If you are using the Delta reclist you'll find lines like this:
_a_pa_sa_ta_da-
To record this line, I suggest you to read it continuously as:
appassattadda
Then you can oto CV and VC (ap, pa, as, sa, and so on).
I manually oto them using setParam. I think the basic rules are just fine. I oto them like this, say you want to oto sa, when zoomed in, it'll look like this:
sssaaa
s|s|s|a|a|a
From left to right, the lines are left blank / offset, overlap, pre-utterance, consonant, and right blank / cutoff. For stop consonants like p, t, k, b, d, g, ts+ (tS), and dz+ (dZ), the offset and overlap will be close to the pre-utterance. Like this:
taaa
|||t|a|a|a
And for the VC, you just reverse the order:
aaasss
a|a|a|s|s|s
aaat
a|a|a|t||
I like Utau because it has more plugin support, and what I like the most in OpenUtau is that I can modify the overlap and preutterance of the notes directly without going to the properties. If Utau has this feature, I'll definitely recommend Utau to you.