Looking for pre-mixer sweetening? Finaliser R‑EQ offers three-band parametic EQ, a two-way aural enhancer that works on the top and bottom end of the audio, and basic DSP effects like reverb and delay.
Classic low-pass gates are probably best associated with the Buchla modulars. However, Rabid Elephant decided against the vactrols, aiming to produce something faster, more accurate, durable and natural-sounding.
There are two AJH modules on review: the Sonic XV, based around an early 24dB diode filter from the Musonics Sonic V; secondly, the discrete transistor-based Ring SM, which can double as a five-input mixer and incorporates a pair of sub oscillator generators.