How To Enable Ducking

[Android Central Question]

I have a Galaxy S8. When I play music and I get a notification, the music mutes as it plays and resumes afterwards. When I first got the phone, it never did that until after an update. When I'm playing a Youtube video and I get a notification, the audio dips for a bit for the notification, and then resumes afterwards, which is what my music did back before the update happened. Is there a phone setting where I can get that back that doesn't involve a 3rd party app?