Blast from the past

In my collection of LPs and 45s (people under 30: LPs and 45s were types of black vinyl discs that people used to listen to music), I have this:It's a stereo recording of "The St. Olaf Lutheran Choir", conducted by Olaf Christiansen (Mercury Records SR-60636). The fun thing about it is reading some of the notes on the back of jacket:

HI-FI Information
This recording was made simultaneously in stereo and monaural in a Hollywood recording studio with Harry L. Bryant at the engineering controls. The choir was set up in standard concert grouping. Five Telefunken U-47 microphones were used as follows: three were placed approximately 15 feet in front of the choir, and 10 feet above the floor. One was suspended 25 to 30 feet in front of the choir, 16 feet high. The fifth microphone was used for solo work. The session was recorded on Ampex tape recorders at 15 inches per second.

[signed]
David Carroll
Mercury Recording Director
Harry L. Bryant
Recording Engineering

Imagine the same sort of thing for your average pop singer today. "This recording was made digitally in an LA studio, with the vocals recorded separately from the rest of the tracks. The artist recorded over 20 takes before we decided to auto-tune the whole thing..."