https://www.lemuraudio.com/plugins/simon/

The new version of SIMON adds a mathematically perfect model of the OP-AMP from a tube mastering equalizer, with three L/R matrix modes: EQUAL — both channels share the same harmonic structure; MODERN — each channel carries a subtly different harmonic structure; and VINTAGE — each channel has a distinctly different harmonic structure. We have also modelled further non-linearities that bring dynamics, liveliness and musicality into the whole system — surpassing the hardware original.

SIMON is a mastering equalizer with a fully symmetrical, two-channel layout. Each channel gives you:
• High and low shelves — a broad high shelf for air and top-end weight, and a low shelf switchable at 50 or 100 Hz for warmth and bottom-end control.
• Three fully parametric bands (LOW, MID, HIGH), each with its own gain, stepped Q and a mastering-grade frequency grid — broad and musical for tone-shaping, tight and surgical when you need to fix a single frequency.
• Its own output trim, so both channels stay independent end to end.
At the centre sits an INPUT TRIM that drives saturation stage: push harder for more harmonic colour and density, with a live SAT indicator showing exactly how hard it's working. AGC (auto gain compensation) keeps the output level matched as you work, so you judge tone rather than loudness — and so equalizing more doesn't secretly drive the saturation any harder.
Every frequency is stepped, so recalls are exact and repeatable — the same setting is the same setting, every time. LINK ties the two channels together for fast, symmetrical moves, and M/S switches processing from Left/Right to Mid/Side for independent control of the centre and the sides.
Three Quality modes cover the whole workflow: ZL (zero-latency) for tracking, HQ for everyday work, and ULTRA for maximum-fidelity bounces.
Formats: VST3 for Windows, and VST3 / AU for macOS (Intel and Apple Silicon).

ON PRICE — AND WHY IT WILL STAY $29
SIMON is $29. A perpetual license. And it will stay $29 — no launch discount that quietly expires, no seasonal 70%-off, no countdown timers.
We thought hard about this. The usual plug-in pricing game creates an unfairness we want no part of: an early customer pays full price and supports the developer, then a few months later finds the exact same plug-in at a fraction of what they paid. That is a poor way to treat the people who backed you first.
So we chose one fair price for a quality plug-in, and we're keeping it there. If you buy SIMON today, you will never feel punished for having supported us early. That's the kind of relationship we want with our customers — a straightforward, honest one.
We'd genuinely love your feedback — on the sound, the workflow, anything. Thanks for reading.
