I had tape decks and I'd spin tape all day... I had screw drivers for the motors... I'd tune the tapes to my guitar tuner and the tape decks to each other so they'd both run a 90 minute tape exactly the same.
 
And really nothing has changed. I spend my life chilling to tunes and watching the levels bounce.
 
I love that I get all these great tapes of my favorite people creating their best vibes. It's just awesome.