The Gsus2 Reentrant tuning transforms your guitar into a resonant soundscape, primarily emphasizing a Gsus2 chord with a unique low A. This tuning is described as a "Rhythm tuning with reentrant on str 6.", indicating its strong rhythmic potential and the surprising pitch of its lowest string, which plays a pivotal role in the tuning's character.

Technical Breakdown:

The open strings are tuned to A2 - D2 - G2 - D3 - G3 - A3 (low to high). This arrangement immediately forms a Gsus2 chord (G, A, D) with multiple octaves and an additional low A. The prominent D and G notes across the lower strings create a rich, droning quality that is ideal for rhythmic accompaniment and open string melodic passages.

While physically the thickest string, String 6 (A2) is tuned up significantly from its standard E2 position, contributing to the "reentrant" feel described in this tuning. This non-standard bass note arrangement (A2 as the lowest note within a Gsus2 context) offers a distinctive harmonic foundation, encouraging creative voicings and melodic ideas that might not be as intuitive in standard tunings.

This tuning is incredibly versatile for rhythm playing, offering a full, open sound. The drone-like quality of the open D and G notes makes it easy to create captivating textures. The open strings themselves form a rich Gsus2 chord (G-A-D), with the low A providing a deep, resonant foundation. Other chords such as Dsus4add9 (D-G-A) or even an Asus4add9 (A-D-G) are inherently present due to the intervallic relationships. Barring across frets will easily yield variations of these chords and allow for melodic exploration, especially given the consistent D-G-A elements across different octaves.

How to Tune:

To achieve the Gsus2 Reentrant tuning, start from standard EADGBe and adjust your strings as follows. Please exercise caution when tuning strings significantly up or down; a change that exceeds 4 semitones (either up or down) may warrant a different string gauge to prevent breakage or poor intonation.

• String 6 (Low E): Tune up 5 semitones from E2 to A2. (*Note: Tuning up 5 semitones is a significant change; consider string gauge.)
• String 5 (A): Tune down 7 semitones from A2 to D2. (*Note: Tuning down 7 semitones is a significant change; consider string gauge.)
• String 4 (D): Tune down 7 semitones from D3 to G2. (*Note: Tuning down 7 semitones is a significant change; consider string gauge.)
• String 3 (G): Tune down 5 semitones from G3 to D3. (*Note: Tuning down 5 semitones is a significant change; consider string gauge.)
• String 2 (B): Tune down 4 semitones from B3 to G3.
• String 1 (High E): Tune down 7 semitones from E4 to A3. (*Note: Tuning down 7 semitones is a significant change; consider string gauge.)

String 6: A2

String 5: D2

String 4: G2

String 3: D3

String 2: G3

String 1: A3