OPFXS DIG DEEP Sub-Harmonic Octaver

Octave down pedal that tracks lower strings

From website:

DIG DEEP is an octave down pedal which tracks lower strings only and generates a monophonic bass line without affecting upper strings. It can be useful to add depth and body to a thin guitar sound or simulate the presence of a bass guitar.

It comes with 2 knobs and a micro switch:

DRY: controls the level of the dry signal
SUB: controls the level of the lower octave
FUNCTION switch: used to set SUB ATTACK, SUB TONE, SPLIT OUT, TRACKING settings

It tracks accurately playing arpeggios or strumming chords, even complex chords and inversions on the whole freteboard.

Dig Deep can work with 6-strings, 7-strings, baritone, semi-acoustic guitars and acoustic guitars with different tunings. By the way, very low tunings with thick gauge strings may cause tracking issues.

https://opfxs.com/prodotto/dig-deep/