: Santana used a Yamaha SG2000 guitar for the recording, achieving the long, weeping sustain that defines the track's "vocal" quality.

The piece is noted for its sophisticated jazz-fusion influence and emotional depth:

: Years later, while touring with Earth, Wind & Fire in Manchester, England, Santana revisited the melody. Tom Coster helped refine the harmonic structure , leading to the completed composition.

: It begins as a slow, longing ballad and builds into a high-energy, double-time finale .