Evilander/newamp

[1.7.0] - 2026-05-30

Added — Eviland: a visualizer that reacts to every instrument

NewAmp's new flagship visualizer, and a genuinely new thing in the space. MilkDrop/butterchurn — and Plexamp, Specterr, Synesthesia, and essentially every Shadertoy audio shader — react to roughly three lumped frequency bands fed through one shared loudness envelope, so everything pulses together on the bass. Eviland is built the opposite way: it runs a 24-band perceptual (mel) spectral-flux onset detector with per-band adaptive thresholds and refractory gating, so each instrument fires its own visual event. A kick blooms a red shockwave from the floor; the snare cracks white off-center and drives a chromatic split; hi-hats sparkle along the top edge; the lead/vocal drifts mid-screen tracking spectral brightness; the bass is a horizon line the whole scene rests on. Frequency maps to vertical position and stereo to horizontal, so it reads like a spectrogram you can feel.

It renders into a WebGL2 RGBA16F ping-pong feedback field — the persistent, flowing substrate MilkDrop fakes with per-pixel equations — advected by curl noise, with a dual-Kawase bloom pyramid and ACES tone-mapping for the glow. Two things no other player's visualizer does:

• Structural memory — a self-similarity novelty curve detects section boundaries (verse → chorus → drop), fingerprints each section, and when a section returns the field visually rhymes with its earlier appearance instead of starting over.
• Anticipation — a kick inter-onset-interval tempo estimate yields a beat phase, so on confident tempo the visuals lead the downbeat (wind up ~80 ms early) instead of chasing it.

Color is derived from the album-art palette plus the live spectral centroid (brightness → hue) and flatness (tonal → saturated, percussive → washed out). It self-throttles across three quality tiers and returns to real MilkDrop on machines without WebGL2 float support — one binary, no separate lite build. New audio infrastructure: dedicated stereo L/R analyser taps in the engine for width/pan. Eviland is the default-prominent first entry in the visualizer picker.

Full Changelog: https://github.com/Evilander/newamp/compare/v1.6.2...v1.7.0