Isn't it obvious that they weren't? One of the guy in spec just blew it. "coz when u do what ur love, u gonna love what u do.." part. He did that many times in other performance as well. They pre-recorded it, and play it to make it sound live. Most kpop group do this. Its kinda new trick to make it seems live.
Yun Heineken but technically it’s still their voices even if it was prerecorded. Some idols only cover dance to songs. I wrote this more than a year ago and at that time i couldn’t tell between pre recorded and live. Now that i rewatched, I can easily tell the difference Also the guy with the glasses is Dawon a.k.a Lee Sanhyuk
I don't know about here but they always live sing since their debut. They are from a survival show d.o.b no matter how hard the performance is, you should watch k.o stage performance. And they were trainee for 6 years