TIL that Sony created a music format called SACD (Super Audio CD) in 1999 that is still around and offers 5.1 surround sound on some albums and much higher sound quality then normal CDs.

https://en.wikipedia.org/wiki/Super_Audio_CD
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1rvd8xp/til_that_sony_created_a_music_format_called_sacd/