THE TUNEGUITAR GUIDE
Understand 8-string standard
Build the layout from the top down
The upper six are ordinary standard; a B1 is added below them, followed by F sharp1. That makes F♯ B E A D G B E from low to high. A familiar six-string fingering still belongs on strings 6 through 1. The lower pair extends the register rather than shifting every standard string downward.
Why the lowest string may look an octave high
F sharp1 is approximately 46.25 Hz; its octave is 92.50 Hz. Small loudspeakers, room noise and the harmonic content of a string can make the upper octave easier to detect. Select string 8, mute the other seven and use a clean signal. A changing octave label is a reason to improve isolation, not immediately to retune.
Use individual checks for the extra range
The site's experimental strum check is designed for six-string setups. For eight strings, use the individual targets or the guided passes. Start with enough sustain for a stable reading and avoid excess gain. Keep the guitar's physical tuning range separate from the software's detection range: detecting a frequency does not establish that your strings should be tensioned to it.
Check the register of every target
| String / course | Note | Hz |
|---|---|---|
| 8 | F♯1 | 46.25 |
| 7 | B1 | 61.74 |
| 6 | E2 | 82.41 |
| 5 | A2 | 110.00 |
| 4 | D3 | 146.83 |
| 3 | G3 | 196.00 |
| 2 | B3 | 246.94 |
| 1 | E4 | 329.63 |
The order follows this preset, not an instruction to rearrange the physical strings. On paired courses, identify the main string and its partner before plucking. A single-note detector cannot prove that two strings sounding together are independently correct.