At 4:12 AM, when most people are deep asleep, DJs and producers hit a creative...

https://fun-wiki.win/index.php/Filtered_Earplugs_for_DJs_%E2%80%93_Do_They_Change_the_Sound_Too_Much%3F

At 4:12 AM, when most people are deep asleep, DJs and producers hit a creative peak or pack up for a 9 AM flight