Queen guitarist Brian May goes back to the mixing board to explain the complexity of layers that went into realizing Mercury’s vision for the song. The original 24-track analogue recording system was far too limited, so the band used the ping-pong technique to “bounce” literally hundreds of overdubs into the mix. May explains how the operatic vocal layers were inspired by the “cascading strings” effect made famous by Annunzio Paolo Mantovani, a technique May first tried out in 1974 with the guitar solo on “Killer Queen.” The video is an excerpt from Inside the Rhapsody, a documentary that was included...