When was the last time you bought physical music?

James Jamerson's bass on "What's Going On", visualized note by note. Legend says Marvin tracked him down at a bar that night, and he played it lying flat on the studio floor. One finger, his '62 Fender Precision Bass, and the rest was history.

25 years ago today, Apple introduced the very first iPod. The original iPod, with 5 GB of storage and the claim of 1,000 songs in your pocket. A hard-drive player that moved digital music from the computer into everyday use.

37 years ago today, Janet Jackson's "Rhythm Nation" was released as a single.

48 years ago today, Gloria Gaynor's "I Will Survive" was released as a single.

60 years ago today, The Jimi Hendrix Experience's "Hey Joe" was recorded.

59 years ago today, Miles Davis's "Sorcerer" was released. Miles with the second great quintet. Wayne Shorter’s writing is central, and Hancock, Carter and Williams keep the music open and elastic.

20 years ago today, Amy Winehouse's "Rehab" was released as a single.

Before Herbie went mainstream, he went interstellar.

50 years ago today, The Jacksons' "Enjoy Yourself" was released as a single.

Common took Erykah Badu to J Dilla's Detroit basement, wall-to-wall records. Dilla told her to pick one. She pulled Tarika Blue, fell for "Dreamflower" and chose the part. Dilla taught her to sample it on his MPC and added drums. That became "Didn't Cha Know"

25 years ago today, Aphex Twin's "Drukqs" was released. A double set that moves from dense, hyperactive electronics to spare prepared-piano pieces. One of Aphex Twin’s most expansive and polarized records.