aesthetic.computer / core
Monorepo for Aesthetic.Computer aesthetic.computer
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core pop marimba c
7 files
.gitignore
build.sh
compare.mjs
flatterbop180.c
fluttabap360.c
README.md
run-c.mjs
README.md

fluttabap360 — C renderer #

Port of the fluttabap360 DSP to C, mirroring the hellsine / nullabye split: JS composes + bakes a score; C does all the DSP. The arrangement brain (BLOCKS, the four passes, the key journey, water-stream gating) stays in ../bin/render-fluttabap360.mjs; --bake emits a flat score of events, and fluttabap360.c synthesizes them sample-for-sample to match the JS reference.

Pipeline #

node ../bin/render-fluttabap360.mjs --bake out/fluttabap360.score.txt   # JS → score
node c/run-c.mjs out/fluttabap360.score.txt --out out/fluttabap360-c.mp3 # C → audio
node c/compare.mjs                                                       # parity A/B vs JS

run-c.mjs builds the engine if stale, renders pre-master f32, then runs the SAME ffmpeg master chain as the JS engine. compare.mjs diffs the C pre-master f32 against the JS --keep-raw f32 (target: RMS diff > 60 dB below the reference — libm-ulp drift only).

Port milestones (verify parity at each step) #

  1. scaffold — build.sh, run-c.mjs, compare.mjs, --bake / --keep-raw / --solo flags on the JS engine, score header. ← in progress
  2. sub + kick — SUBSINE (butter sine sub) + kick. First parity check.
  3. modal marimba — port ../synths/marimba.mjs (xylophone/bass/kalimba/ glock/vibraphone presets, modal partials, mallet impulse, tube resonator, tremolo, stick-click). Benefits the whole marimba lane.
  4. perc + scratch + scream — port ../synths/perc.mjs.
  5. ambience + mix — PAD, drop, waterStream, reverbInPlace, delayInPlace, tape-fuzz + hiss, mixdown panning / normalize / final-lift / clamp.

The ffmpeg master chain (EQ / comp / limiter + DistroKid loudnorm) is NOT ported — it stays in run-c.mjs, fed the C engine's pre-master f32.

Score format #

Text, one event per line; # comments. Header sets sr, ns (sample count), and global mix params. Per-voice lines carry the synth name + its params + absolute start time in seconds (post-swing/humanize — the JS bakes the already jittered times so the C engine stays a pure synthesizer with no RNG of its own, except the deterministic per-voice noise seeds which are derived from the event exactly as the JS does).