The "Octave E tuning 5 string" for Bass Electric is a profound and impactful tuning designed to deliver an incredibly deep and resonant low-end experience. It pushes the boundaries of a standard 5-string bass, extending the tonal range significantly downwards.

Technical Analysis:

This tuning sets the strings to E0-E1-A1-D2-G2, from the lowest (5th) to the highest (1st) string. The most striking feature is the ultra-low E0 on the 5th string, which is a full octave below the standard E1 found on a 4-string bass, providing an unparalleled foundational rumble. The 4th string is tuned to E1, creating a perfect octave interval with the 5th string. The remaining strings (A1, D2, G2) perfectly mirror the familiar standard EADG tuning of a 4-string bass, but starting from the 3rd string on this 5-string instrument. This combination offers both an extended low register and a familiar fingerboard layout for the upper strings.

Open String Chords and Harmonic Opportunities:

While traditional chords are less common on bass due to the wide intervals, this open tuning provides a rich harmonic palette. The open strings E0, E1, A1, D2, G2 inherently contain the notes E, G, A, D. This collection of notes forms a powerful E minor 7th chord (E-G-B-D, with an implied B that can easily be fretted on the A string) with an added 4th (A). The dual E strings (E0, E1) provide immense foundational support for any E-based harmony, allowing for massive power chords or drones. This tuning is exceptionally well-suited for genres requiring deep, driving bass lines, such as doom metal, progressive rock, funk, and electronic music, where extended low range and robust harmonic support are paramount.

How to Tune:

Important Note: Given the significant tuning adjustments required, especially the large drops in pitch, it is strongly advised to use heavier gauge strings specifically designed for lower tunings to ensure proper tension, intonation, and to prevent potential damage to your instrument or strings. Tuning down beyond 4 semitones can lead to very loose strings if a standard gauge is used.

• 5th String (Lowest, E0): Tune down 9 semitones to reach E0. This is a substantial drop.
• 4th String (E1): Tune down 12 semitones (a full octave) to reach E1.
• 3rd String (A1): Tune down 12 semitones (a full octave) to reach A1.
• 2nd String (D2): Tune down 12 semitones (a full octave) to reach D2.
• 1st String (Highest, G2): Tune down 12 semitones (a full octave) to reach G2.