Routing the Reese through a filter for its sub adds sub-bass that follows the main Reese's movement

A Reese bass is typically rich in mid-range harmonics but light on sub-bass. A naive fix is adding a separate sine-wave oscillator tuned to the root note as a sub. However, this produces a static sub with no movement — it doesn’t follow the modulation and wobbling of the main Reese, creating an unnatural separation between the moving mid-range and a flat, static sub. A better approach: route the main Reese signal through a low-pass/band-pass filter (e.g., FM8’s Z filter), then mix the filtered output (which is low-frequency-heavy) alongside the distorted mid-range. The filter sub carries the same movement as the Reese because it derives from the same source signal, keeping the bass and mid coherent. This is a key distinction in neuro/Noisia-style bass construction.

Examples

In FM8: route the saturated operator (X) into the filter (Z), set filter to low-pass or LP/BP blend with low resonance, then mix Z output alongside X output. Compare to adding a separate sine: static sub vs. movement-following sub.

Assessment

Explain why a separate static sub oscillator is less convincing under a Reese bass than a filter-derived sub; then describe the FM8 routing that achieves the movement-following sub.