Raisa’s place is really in the center of the old town area, you just need to walk about 10min, then you can arrive at most of the attractions, about 25-30mins to the castle.
Also there are some very good cocktail bars and restaurant nearby, only 100m away.
And I think the sound proof is kind of good, even people were crazy on Saturday in the pubs, but the music didn't annoy me to sleep.