OPFXS Dig Deep MK1 Sub-Harmonic Octaver Pedal

The OPFXS Dig Deep MK1 is a sub-harmonic octave-down pedal designed to add a monophonic bass line underneath your guitar signal. It tracks the lower strings only, leaving the upper strings unaffected, making it a clever way to add depth, body and low-end weight without losing your original guitar character.

With independent Dry and Sub controls, Dig Deep lets you blend your clean guitar tone with the generated lower octave. The function switch gives access to key settings including sub attack, sub tone, split out and tracking behaviour, allowing you to fine-tune the feel and response for your setup.

Dig Deep MK1 is designed to work with 6-string, 7-string, baritone, semi-acoustic and acoustic guitars across different tunings. It tracks arpeggios, strummed chords, complex chords and inversions, making it useful for solo performers, loop-based players, ambient textures and guitarists looking to simulate a bass layer from one instrument.

• Sub-harmonic octave-down pedal for guitar
• Generates a monophonic bass line from the lower strings
• Upper strings remain unaffected for natural chord clarity
• Great for adding depth, body and low-end weight
• Dry control adjusts the clean guitar level
• Sub control adjusts the lower octave level
• Function switch controls sub attack, sub tone, split out and tracking settings
• Tracks arpeggios, strummed chords, complex chords and inversions
• Suitable for 6-string, 7-string, baritone, semi-acoustic and acoustic guitars
• Approx. 5–7 ms latency for responsive tracking
• Useful for solo guitar, looping, ambient textures and bass simulation