gibribbon

GIBRIBBON (video) — an AUDIO-DRIVEN rhythm line-runner in the spirit of Vib-Ribbon, cast with DOOM shareware sprites as fair-use artistic parody (owner-ruled rewrite 2026-08-28; audio-in redirect 2026-08-29). Like the original game — which analyses the music (any CD the player inserts) and builds its course from interesting frequency changes — the course derives from whatever is patched into AUDIO IN: the module's own analyser folds the signal into four musical bands (bass 20-200 / low-mid 200-1k / high-mid 1k-4k / treble 4k-16k Hz), and an ADAPTIVE extractor spawns events on relative peaks against each band's own rolling baseline, biased toward spectral-flux onsets — any source at any level plays, silence and stuck-flat signals spawn nothing, and there is no gain calibration anywhere in the path. THE BAND IS THE EVENT: bass=LOOP road dips (A), low-mid=JUMP humps (B), high-mid=IMP (X), treble=ZOMBIE (Y) — the low end shapes the road, the highs send the monsters (real TROO*/POSS* sprites when DOOM1.WAD is present, line-art otherwise; the marine is PLAY*). THE DAMAGE MODEL IS VIB-RIBBON'S: an uncleared event HITS the marine and degrades him one VISIBLE form down a DOOM ladder (the status-bar face mugshot grades from grin to bloodied; the line-art figure loses limbs), like Vibri degrading rabbit-to-frog-to-insect; hits at the floor are GAME OVER (evt_gameover pulses; the restart gate / R key / RESET revives); streaks heal and a long streak reaches gold SUPER. One clock: the internal TEMPO transport paces the ribbon while the audio decides what spawns; judgement is phase-anchored to it. An idle unpatched module self-plays in labelled ATTRACT (its bot deliberately fumbles so the ladder shows); any input — buttons, keyboard, or MOVING audio — starts a real run. Outputs: out (video), evt_hit/miss/fire/kill/gameover (10 ms gates), health_cv. Pure deterministic engine (gibribbon-engine.ts) + pure spectral fold (gibribbon-spectral.ts); VRT-baselined via the __gibribbonVrtSeed/__gibribbonVrtTicks pins. DOOM shareware terms apply (same file as the DOOM module, read-only).

An audio-driven rhythm line-runner in the spirit of Vib-Ribbon, cast with DOOM shareware sprites as fair-use artistic parody. Like the original game — which analyses the music (any CD the player inserts), looks ahead, and builds its obstacle course from interesting frequency changes — GIBRIBBON derives its course FROM THE SIGNAL you patch into AUDIO IN: the module's own analyser folds the input into four musical bands (bass 20-200 Hz, low-mid 200-1k, high-mid 1k-4k, treble 4k-16k), and an ADAPTIVE extractor spawns events on relative peaks against each band's own recent baseline, preferring spectral-flux onsets (the beat). Because prominence is relative, ANY source at ANY level plays — a quiet field recording and a hot drum bus alike — and silence or a stuck-flat signal spawns nothing. THE BAND IS THE EVENT: the low end shapes the ROAD (bass = LOOP pit-V dips, low-mid = JUMP humps) and the highs send the MONSTERS (high-mid = imps, treble = zombies/former-humans, rendered as real DOOM sprites when DOOM1.WAD is present, wireframe line-art otherwise). Clear each event with its ABXY button (loop=A, jump=B, imp=X, zombie=Y) inside the timing window as it reaches the marine; a ~2-bar lookahead lane names the next buttons. THE DAMAGE MODEL IS VIB-RIBBON'S: an event you fail to clear HITS the marine and degrades him one visible form down a DOOM ladder (the status-bar face grades from grinning to bloodied), like Vibri degrading rabbit-to-frog-to-insect; hits at the floor are GAME OVER; clean streaks heal forms back and a long streak reaches gold SUPER. Restart from the restart gate, the R key, or the RESET action — wire evt_gameover back to restart for an endless arcade loop. TEMPO sets the ribbon's course rate (the audio decides WHAT spawns, tempo decides how fast it approaches); DIFFICULTY scales density and speed together. An idle, unpatched module self-plays in ATTRACT mode — honestly labelled IN the picture, and its demo bot fumbles now and then so you can see the damage ladder work; any input (a button, the keyboard, or MOVING audio arriving at AUDIO IN) starts a real run. Play it three ways: patch a gamepad module's a/b/x/y gates + lx/ly axes straight in, click the screen and use the keyboard (F/D/J/K or arrows, R = restart), or sequence the rack from the event gate outputs — the game is half a sequencer.

the faceplate

inputs

outputs

params

controls

source

gibribbon.ts on GitHub.