The 7#9 chord, widely known as the "Hendrix chord" due to its prevalent use by legendary guitarist Jimi Hendrix, is an altered seventh chord that consists of a dominant 7 (b7) and a sharp ninth (#9) interval. This chord often adds a distinct flavor to blues, jazz, and rock, as its dissonant and edgy sound creates a sense of tension and expressions. Typically, a 7#9 chord is built from a dominant 7th chord base, so for an E7#9, you would use the notes E, G#, B, D, and F## (which is enharmonically equivalent to G). As a guitarist, navigating this chord might involve barring techniques or stretching the fingers to achieve those extended reaches. **Suggested fingering for E7#9:** - Low E string (6th string) – open or not played - A string (5th string) – 7th fret - D string (4th string) – 6th fret - G string (3rd string) – 7th fret - B string (2nd string) – 8th fret - High E string (1st string) – usually not played Understanding this chord involves recognizing its role in building musical tension and its frequent resolution to a more stable chord, providing dynamic and vibrant soundscapes often used in rhythm and lead guitar playing.