Get in your gut and out of your nose and throat. Especially when pushing to higher notes. Drop an octave and focus on the consistency...Auto tune at the end sounds like shit.
This recent year they had 4 world tours... I mean they're so active on live performance side... Their FNC Kingdom lives Specifically JYH solo performance on Kingdom 2019 while other members were in military service yet ... these performance have a good bunch of their famous hit songs...
I was at a hotel in the early 90's when a group called Bell Biv Devo (sp?) was staying there. One night a beautiful bass voice rang out in the atrium with perfect acoustics, singing _a cappella_ . I was told it was the father of one of the boys in the group. Nice use of a great acoustical opportunity, both of you.