But other radio formats are getting more repetitive, too, while the line is blurring between pop songs and songs that once fit more neatly in other categories, as artists and listeners to embrace a wider variety of sounds as they jump from genre to genre on digital playlists.
become less clear and sharp
become or make something become difficult to distinguish clearly
「かすむ」 mist, film, glaze
「ぼやける」dim, become dim
「鈍る・鈍らせる」 blunt, rust