SOURCES — Four Ways a Machine Refuses to Sit Still

Chaos attractors — the Lorenz and Rössler systems — are the mathematics of weather, convection and turbulence: motion that is deterministic but never repeats. Until now they have lived locked inside synth modulation menus. ENTROPY extracts them into a cross-purpose insert, and integrates the actual attractor equations in real time.

• · DRIFT — a mean-reverting random walk (an Ornstein–Uhlenbeck process, the physicist's model of Brownian wander). The "nothing in this circuit is a precision reference" floor.
• · WOBBLE — thermal wobble: a slow quasi-sine whose own rate and depth wander, like a thermostat cycling in a warm room. Periodic, but never quite.
• · CHAOS — a true Lorenz or Rössler attractor, selectable, integrated live. Unhurried lobe-flips and moods, not LFO cycles.
• · AGE — component aging. Each instance is born with its own hidden bias vector and settles toward it over the session. No two instances age alike, and every session starts fresh from the bench.

ENGINE — One Knob Decides How Much They Conspire

The four targets tap different state variables of one attractor run — so pitch, filter, gain and image move like four stages fed from the same failing power rail: distinct, but unmistakably related.

• · CORRELATE — sweeps from one master drift signal moving everything (the single shared power rail of a real box) to every target wandering alone.
• · RATE — scales the whole engine from geological (0.05×) to seasick (20×).
• · AMOUNT — a single macro over every depth, so the entire character rides one control.
• · Drift Scope — draws the actual modulation signals the engine is running, not an animation. Four colour-coded traces scroll a twenty-second window with a session-age readout ticking underneath.

TARGETS — Physics With Opinions

Every calibration is deliberate: at moderate settings ENTROPY reads as analog, not as an effect. Push it and it becomes an instrument of its own.

• · PITCH — up to ±60 cents of genuine pitch drift through a continuously modulated delay line, the same physics as tape wow. Sustained sharp excursions soft-limit before flat ones do, exactly like a capstan running out of torque.
• · FILTER — a one-pole low-pass that only breathes down from 21 kHz (up to ~2.2 octaves). Warm components drift dark; ENTROPY does not pretend otherwise.
• · GAIN — ±3 dB of slow level wander. Console VCA, late in its life.
• · STEREO — channel balance drift (±2.5 dB) plus width breathing (±35%) on a decorrelated tap, so the image leans and swells like a mistracking azimuth.