2AM's Jo Kwon shared that J.Y. Park is personally involved in how the idols take care of their voices.

On the April 11th broadcast of KBS2's 'Happy Together', Jo Kwon told a funny story of how producer and JYP Entertainment's J.Y. Park takes care of 2AM. He said, "Park Jin Young advised us not to speak for 5 hours after we wake up. To be honest, the day before his concerts, he does not speak and communicates with people by writing his thoughts in a sketchbook."

Yoo Jae Suk chimed in, "But during that concert, his voice kept breaking from the first song to the last," causing everyone to laugh.

Jo Kwon also said, "J.Y. Park once gave me a CD to listen to while I exercised my throat. I was looking forward to it because I thought it was a CD with professional vocalization methods, so I ran over to our practice room and turned the CD on." He continued, "But when I turned it on, J.Y. Park's voice was recorded on the CD! And I couldn't even understand the vocalization."

He explained that the only sound from the CD was "Eee, eee, eee." The rest of the panel couldn't help but burst into laughter, commenting, "What kind of vocalization is that?"