The sound from MUTS was not a problem at all, in fact, the Entertainment Director specifically asked us if the new movies and events were an issue for us in the suite.
We advised that the DJ on sail away was too loud as we could hear him in the suite for about 2 hours and they thanked us and said it would be sorted.
At the rear of the balcony where there are loungers and the clamshell we were able to have conversations without any noticeable noise from the front of the ship and even when we had our balcony dinner and afternoon tea at the front of the balcony, we were able to converse at normal levels without MUTS being any sort of a problem.
I was able to take in the ocean without ever feeling that it was a noisy environment and was never distracted apart from sail away, which as I say, was sorted.