Dub techno chord voicing stacks fixed semitone offsets to build a minor chord from one incoming note

In modular dub techno patches, a single pitch CV value arriving from a sequencer can be expanded into a full chord by using stacking modules (such as Bog Audio Stack) that generate transposed copies at fixed semitone offsets. A minor chord requires offsets of 0 (root), +3 semitones (minor third), and +7 semitones (perfect fifth). These three CV values are merged and fed to oscillator voices that play simultaneously. The characteristic dub techno timbre comes from additional processing: a slow filter envelope and LFO evolve the sound over time, while saturation, clock-synced delay and reverb build the dub wash. This avoids programming three separate sequencer rows for the chord.

Examples

VCV Rack dub techno patch: SEQ trigger → Stack (offsets 0, +3, +7) → Merge → oscillator → filter (with slow QUAD LFO on FREQ) → Bonsai saturation → clock-synced Delay → Reverb. Change Stack offsets to +4 instead of +3 for a major chord.

Assessment

What semitone offsets produce a minor chord? How does the Stack/Merge workflow differ from programming three separate sequencer rows for chords? Name one benefit and one limitation of each approach.