Lumin (Legacy)

From the vendor

A unique tone-shaping tool that allows you to enhance the clarity of your signal by phase-correcting the low, mid and high frequencies separately.

Project description

The Lumin project is a workalike of the BBE Sonic Stomp / Sonic Maximizer. It’s based on work done by Bajaman (documented on FSB)[1] and Sebastian Montti (stm) on DIYStompboxes in recreating the functionality of BBE’s proprietary NJM2150AD chip.[2]

I intentionally designed this circuit around six dual op-amps instead of a quad and a dual like most other comparable projects. Your quad op-amp choices are pretty limited, but with duals you have a lot of other options like the NE5532 or OPA2134 if you want to try something different.

This project also has a midrange knob, giving you an additional frequency band to play with, and optional switches that allow you to change the frequencies for the Process (high) and Contour (low) knobs.

Notes & references • The original Sonic Stump project by Bajaman on freestompboxes.org ↩ • Two fantastic technical descriptions by Sebastian Montti (stm) on diystompboxes.com regarding the behavior of the state variable filter: #1, #2 ↩