A Grain Delay pitched down an octave turns a chord's delays into the track's sub bass

In this dub techno chain the sub bass is not a separate bass instrument — it is generated from the chord by a Grain Delay set to pitch ‘-12’. The Grain Delay both delays the chord and pitches those delayed copies down an octave, so raising its Dry/Wet feeds a delayed, octave-lower signal into the mix that becomes the main weight of the bass. Because it is driven by the chord, the bass inherits the chord’s rhythm and movement, and it can be dramatically introduced by opening the Grain Delay wet amount when the beat comes back in. This is a distinctive, efficient way to create a delayed sub-bass element that locks to the chord.

Examples

Grain Delay with Pitch -12 after the chord’s filter; raising its Dry/Wet (mapped to a macro, automated) brings in the ‘system-shaking’ octave-down bass when the beat returns. Feedback controls how the sub-delays evolve.

Assessment

How does a single Grain Delay set to -12 semitones generate a dub techno track’s sub bass from the chord, and what parameter do you open to bring that bass in dramatically?