Once Upon a Time... in Hollywood OST. Quentin Tarantino basically made a mixtape of tunes from the 60's (the movie takes place in 1969), and it contains commercials and promos from local Los Angeles radio stations from the era. A fun listen. Some songs you may be familar with, many you might not have heard. I've seen the movie, but I listened to this first and it kind of primes you for viewing the film since all the music and radio DJ chatter is featured throughout, sometimes prominently, other times in the background. Anyway, QT always puts a lot of emphasis on music in his films, and obviously carefully considers how the music fits with certain scenes and the overall atmosphere and this is no exception.