The Classic: The Bach-derived organ line is the most famous six notes in British rock history. In FLAC: Close your eyes. Listen to the separation. Matthew Fisher’s organ is placed dead center, but listen to the reverb tail—it decays naturally into the right channel. Gary Brooker’s vocal is double-tracked in places, a detail lost in lossy formats. The bass drum hit at 1:24 is not a thud; it’s a thwack with skin resonance. You also hear the subtle acoustic guitar strumming buried under the organ—a ghost in the machine.