Andrew Wasson. Graduated from Hollywood California's Guitar Institute of Technology. Operates Music School and CreativeGuitarStudio.com
The "Spanish sound" is generally quite simple to study since it will tend to employ the classical (nylon string) guitar in very similar ways. These "Spanish" musical pieces will tend to follow a fairly common group of harmonic movements as well. This will primarily include the tonality of minor key sounds, (with a focus upon natural minor, harmonic minor, and the Phrygian mode).
These Spanish flavored pieces will generally employ a common chord progression movement with mixed major and minor triad use. These triad chord ideas will tend to get combined against both dominant 7th and diminished (both diminished triad and diminished 7th) chords.
Spanish guitar is most definitely an easily recognizable guitar style. And, once a guitarist has made a study of it, they can simply follow the popular harmonies to achieve that unique "Spanish guitar effect." Enjoy!
About the Author:
Andrew Wasson is a 1992 Graduate of Hollywood California's Guitar Institute of Technology (G.I.T.). He has operated his Canadian Music School, Creative Guitar Studio, for the last 20+ years teaching thousands of guitarists. You can learn more at his official website.