Big deal, grow up peoples. Like no one here ever spaced out for 20 minutes. Or learn the Daf. Or bring headphones and listen to Rosseta Stone Yiddish classes. Just go with the flow. It’s healthier that way.
You asked where it started and if Yom Kippur is next.
Actually, it started in the Bais Hamikdosh on Yom Kippur
during the Avodah, which where accompanied by musical
instruments. If it was ok there, it’s ok here.