This is the Backing Track without Vocals & Guitars from Shine On You Crazy Diamond Lesson.
The Backing track is a WAV file
“Shine On You Crazy Diamond” is a nine-part Pink Floyd composition written by David Gilmour, Roger Waters, and Rick Wright. It appeared on Pink Floyd’s 1975 concept album Wish You Were Here. The song was conceived and written as a tribute and remembrance to their former band member Syd Barrett; the title of the song itself can also be seen as a reference to Barrett (Shine On You Crazy Diamond).