You can click/tap on the individual monster portraits to mute/unmute them! The little bar at the bottom is a timer showing how much of the song is left. If the song tends to de-synchronize for you, I recommend using Turbo Mode (Shift+Flag)
Big Blue Bubble is the creator of My Singing Monsters, all assets used belong to them. Just a silly little project I made for funsies! Latest Update: Project Uploaded (as of Hairionette)