Stevie Ray Vaughan’s Pride and Joy is notated in the key of E, although with Vaughan’s guitar tuned one-half step lower, resulting in the pitch of E♭, in 4/4 time with a moderately fast tempo. Listen for Vaughan extracting extra sound from the guitar by choosing finger shapes that allow the maximum number of strings to ring at a time, often the top E-string.
https://youtu.be/Kqb9IFVIIFg