Songfacts®:

• The studio version of this group composition (Areas, Brown, Carabello, Rolie, Shrieve - and the man himself), runs 4:46, and like the rest of the band's debut album was recorded at Pacific Recording, San Mateo, California, May 1969.
  
  In the June 2011 BBC TV documentary The Santana Story: Angels And Demons, it's described as a "jazz-blues improvisation that signposted the musical route Santana would later travel." This is a fair description of both the song and the progression Carlos took, both within and outside his band. This instrumental track is divided between keyboard and guitar with an emphasis on the former.
• A longer version can be found on Santana Live at the Fillmore '68 which although recorded in December 1968, was not released until 1997, on the Columbia label. >>>

  Suggestion credit:
  Alexander Baron - London, England, for above 2