In the first solo riff, Carlos Santana is playing in the key of Dm, which means that the solo is based on the D Pentatonic Minor scale.
Remember, the Dm would be in the 1st position, the Gm would be in then 4th position and the Am would be in the 5th position.
Solo 1
Guitar 1:
The beginning of this solo is played by itself, which sets up the rest
of the solo.
Guitar 2:
This guitar would be considered a keyboard part, but in this case can
logically be played on the guitar.
