I was wrong; North Korea did reciprocate by terminating its cross-border loudspeaker broadcasts as well. According to WSJ:
Loudspeakers Go Quiet on Korean Border, Ending a Year of Audio Aggression
Pyongyang halts daily transmissions of animal noises soon after Seoul ended broadcasts of K-pop and news
Loudspeakers Go Quiet on Korean Border, Ending a Year of Audio Aggression - WSJ