This tuning, aptly named "Emaj9," is designed to resonate with a rich, full E Major 9th chord when played open. The original description notes it was "messed around with open Bmaj (another good tuning)," suggesting an experimental approach to finding interesting voicings. Its designation as "jazzy" points to the sophisticated harmony of the Major 9th chord, offering lush textures for improvisation and composition. The "midwest emo if capo on 1" hint suggests that while open, it provides a bright, somewhat melancholic, and ringing quality often found in that genre, especially when shifted up a semitone to an Fmaj9. This tuning offers a wide-open, shimmering sound, ripe for arpeggios, fingerstyle, and complex chord extensions.

Technically, the open strings are tuned to E2, B2, D4#, F4#, G4#, D5#. Analyzing these notes reveals the full E Major 9th chord (E - G# - B - D# - F#) across the open strings. Specifically: the 6th string is the Root (E), the 5th string is the Perfect 5th (B), the 4th string provides the Major 7th (D#), the 3rd string is the Major 9th (F#), the 2nd string gives the Major 3rd (G#), and the 1st string supplies an octave higher Major 7th (D#). This arrangement creates a rich, full voicing of Emaj9, spanning a wide harmonic range. It is important to note the significantly high pitches specified for the higher strings (D4#, F4#, G4#, D5#). Achieving these notes as open strings on a standard guitar may require careful consideration of string gauge and tension, potentially necessitating lighter gauge strings or a specialized setup to avoid excessive tension or string breakage if tuned up significantly from standard pitch. The inherent Emaj9 chord provides a strong harmonic foundation for intricate melodies and chordal work. Simple single-finger barres or partial fretting can readily yield other related chords, expanding improvisational possibilities within the "jazzy" framework.

Open String Notes:

• String 6: E2
• String 5: B2
• String 4: D4#
• String 3: F4#
• String 2: G4#
• String 1: D5#

How to Tune from Standard E-A-D-G-B-E:

• String 6 (Low E): Keep as is; no change (0 semitones). (Target Note: E2)
• String 5 (A): Tune up 2 semitones. This moves the A2 to B2. (Target Note: B2)
• String 4 (D): Tune up 1 semitones. This moves the D3 to D#3. (Target Note: D4# - Note the octave difference from standard D3. Tuning up one semitone achieves D#3, not D4#.)
• String 3 (G): Tune down 1 semitones. This moves the G3 to F#3. (Target Note: F4# - Note the octave difference from standard G3. Tuning down one semitone achieves F#3, not F4#.)
• String 2 (B): Tune down 3 semitones. This moves the B3 to G#3. (Target Note: G4# - Note the octave difference from standard B3. Tuning down three semitones achieves G#3, not G4#.)
• String 1 (High E): Tune down 1 semitones. This moves the E4 to D#4. (Target Note: D5# - Note the octave difference from standard E4. Tuning down one semitone achieves D#4, not D5#.)