At the time when I was working in our dental clinic, recorded music for headphones and office ambience was hard to come by. A small cassette player was all we could offer our patients, and eventually they had heard all of the albums we owned. We were living in an area where radio reception was intermittent at best, and satellite stations hadn’t been invented yet. What we had was an enormous reel-to-reel system and about 10 huge reels of tunes we had prepared ourselves. We thought this would be enough music to last forever considering the number of albums we had recorded (illegally, I now realize), but after a few months, as the reels played, were changed, and played again, we could all hum the next tune before it even started!