"Your music." The heavy techo beats he heard outside have beckoned him in, and now that he is here, there is little desire to leave - unless she bids him to do so. It is not unlike the modern version of a caravan fire, full of laughter, drink and rhythm, though Vidar would not think to put it verbally in such terms.
But he rather likes the thundering noises, and the general cheer that seems to accompany them. "Do you mind?"