This is the "Jack Daniel Teasdale" tuning, described as the "Main Tuning in my band slashes//". It's a highly unconventional 7-string guitar tuning designed for a specific sonic landscape, likely contributing to a distinctive and heavy sound for the band.

Technically, the tuning notes from the lowest (7th) to highest (1st) string are: F1, A#2, F2, A#3, D#4, F3, A#4. This arrangement presents a very unique set of intervals between adjacent strings. We observe significant drops in pitch, such as from A#2 to F2 (a tritone down, 6 semitones), and D#4 to F3 (a major 6th down, 9 semitones), interspersed with large upward jumps, particularly an augmented 11th (16 semitones) from F1 to A#2, F2 to A#3, and F3 to A#4. These extreme variations in pitch make for a complex harmonic structure that likely does not resolve to a simple open chord when strummed traditionally.

Despite the unusual string intervals, the tuning heavily features the notes F, A# (which is enharmonically Bb), and D# (enharmonically Eb). If we consider these notes without their specific octaves (F, Bb, Eb), they form a cluster that could be interpreted as an F7sus4 chord (F - Bb - C - Eb) without the C, or a stack of perfect fourths (F to Bb, Bb to Eb) with F as a root. This suggests a resonant, perhaps industrial or even jazz-influenced tension, but in a very low and dense register.

Due to the prominent F and A# notes, this tuning could be highly effective for drone passages, heavy riffs built around these specific intervals, or creating intricate melodic lines that exploit the large intervallic leaps. Barre chords, when applied, would shift this unique interval structure up the neck, creating moving chordal textures rather than traditional major or minor shapes. The overall sound would be dark, dense, and full of character, perfectly suited for a band aiming for a unique sonic identity.

The individual string tunings for the "Jack Daniel Teasdale" setup are as follows, from the lowest (7th) to the highest (1st) string:

• String 7: F1
• String 6: A#2 (Bb2)
• String 5: F2
• String 4: A#3 (Bb3)
• String 3: D#4 (Eb4)
• String 2: F3
• String 1: A#4 (Bb4)

How to Tune:

To achieve the "Jack Daniel Teasdale" tuning, follow these specific adjustments for each string. Please exercise caution when tuning, especially with significant pitch changes. For movements exceeding 4 semitones up or down, considering a different gauge string is often advised to prevent excessive tension or looseness and to ensure optimal playability and intonation.

• String 7: Tune down 6 semitones to reach F1. * (A different gauge string is advised for this significant drop.)
• String 6: Tune down 6 semitones to reach A#2 (Bb2). * (A different gauge string is advised for this significant drop.)
• String 5: Tune down 4 semitones to reach F2.
• String 4: Tune down 4 semitones to reach A#3 (Bb3).
• String 3: Tune down 4 semitones to reach D#4 (Eb4).
• String 2: Tune down 6 semitones to reach F3. * (A different gauge string is advised for this significant drop.)
• String 1: Tune down 6 semitones to reach A#4 (Bb4). * (A different gauge string is advised for this significant drop.)