Someone was whistling. I started, the tune instantly recognizable. “Remember Him Still.” Eoin’s favorite. I was out in the middle of the lake, and someone was whistling. The whistling shivered through the mist, a cheerful flute in the eerie white, disembodied and disparate, and I couldn’t tell from which direction it originated.
What does this disembodied and disparate together mean? I know disembodied suggests that the sound wasn't emanating from any obvious physical source, and disparate means different (?), but what does it mean together, putting in the context?