A "Greatest Hits" 5.1 CD would likely contain the surround mixes for these iconic tracks found on Discogs and official compilations: We Will Rock You

Unlike standard "upscaling," these mixes were built from the original multi-track masters. This allowed the engineers to place specific instruments—like John Deacon’s bass or Roger Taylor’s backing vocals—in the rear speakers to envelope the listener. Highlights of the DTS Experience

: In tracks like "Bohemian Rhapsody," the operatic vocal "answering" sections move between the rear and front speakers, creating a "wrapped" sensation that stereo cannot replicate.

DTS (Digital Theater Systems) 5.1 Audio CDs were the answer. Unlike a standard CD which offers two-channel stereo, a DTS 5.1 CD contains six discrete channels of audio:

This is where the magic happens. You’ll hear backing vocal harmonies, percussion flourishes, and "answering" guitar licks swirling around your head.