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Reference for every filter, modulation, and pattern effect in Strudel — the "weird stuff" toolbox. Use when a track sounds flat and needs movement, distortion, granular texture, or character. Organised by category, with idiomatic usage and what each effect *actually does to your ear*.
用 Codex 或 Claude 帮你安装 复制这段 Prompt，粘贴到 Codex、Claude 或其他助手里，让它检查 Skill 页面并帮你完成安装。
基于 SOC 职业分类
Write a new Strudel track or extend an existing one from a brief. Use when the user wants to compose, draft, sketch, or add a track to the album in this repo, or asks for a Strudel pattern in a given vibe/genre/reference.
Generate 2-3 variations of an existing Strudel pattern for A/B comparison. Use when the user wants to explore alternatives, hear different takes, says "give me options", "try a different version", "variations on this", or wants to evolve a track without committing yet.
Generate a brand-new song by reading the whole skill rack and composing in one artist's style — chasing TIMELESS, catchy, instant-classic tunes, not pastiche. Use when the user says "turn the crank", "/turn-the-crank", "crank one out", "make a song in someone's style", or wants a fresh generated track for the album. Claude picks the artist. Bonobo-style layering crescendo; drums only if the song wants them, with a kit that FITS (Travis-Barker busy style is one option, not a default). Sparse→bloom arc (track 01 "dawn" is one example, not a required template — size the arc to the song).
The craft of memorable melody — motif construction & development, contour, melodic rhythm, call-and-response, earworm hook science, tension notes & resolution, register/range, and the common failure modes (wandering lines, no anchor, unresolved tension that just sits there). Use when writing a melody, making it catchier, building a hook, the melody feels aimless or forgettable, or you need a motif to develop across a track.
Complete reference for every sound our Strudel tracks can use — the loaded sample banks (VCSL orchestral mallets/winds, ~50 drum kits, mridangam, the full TidalCycles Dirt set, eddyflux/crate world percussion, amen breaks), the 128 General MIDI soundfont instruments (gm_violin, gm_cello, gm_string_ensemble, gm_flute, gm_choir_aahs, gm_pad_*, gm_lead_*…), the built-in synths + FM, and how to load more (github: packs, shabda→Freesound, the open-strudel-samples explorer). Use when picking a voice, reaching for instrument variety, or when a sound isn't playing.
Load a Strudel pattern into strudel.cc via agent-browser, play it, and verify it parses and runs without error. Use after composing or editing any track in this repo, or when the user says "test the track", "does this work", "play it", or wants to verify a Strudel pattern.
| name | strudel-effects |
| description | Reference for every filter, modulation, and pattern effect in Strudel — the "weird stuff" toolbox. Use when a track sounds flat and needs movement, distortion, granular texture, or character. Organised by category, with idiomatic usage and what each effect *actually does to your ear*. |
Strudel exposes the full Web Audio + custom DSP chain. Most "flat sounding" tracks aren't missing voices — they're missing movement and weight on existing voices. Reach for these.
| Method | Effect | Idiom |
|---|---|---|
.lpf(N) | low-pass cutoff (Hz) | lpf(sine.range(200, 1500).slow(16)) slow filter sweep |
.hpf(N) | high-pass cutoff | hpf(3000) thin out a hi-hat to just the click |
.bandf(N) | bandpass center | telephone-voice on vocals |
.lpq(N) / .hpq(N) | resonance (0–30+) | lpf(800).lpq(8) self-oscillating filter scream |
.lpenv(N) | filter envelope amount | env opens filter on attack |
.lpattack(N) / .lpdecay(N) / .lprelease(N) | filter env ADSR | shape the open-shut motion |
Recipe — Bonobo lush pad: .lpf(sine.range(400, 1200).slow(20)) — slow breathing filter, 20-cycle sweep.
| Method | Effect |
|---|---|
.room(0–1) | reverb send wet amount |
.roomsize(N) | room size (small → cathedral) |
.roomlp(N) | low-pass on reverb tail |
.roomdim(N) | dim/dampen reverb |
.ir("hall") | impulse-response reverb (named IRs) |
Recipe — Kiasmos cathedral strings: .room(0.95).roomsize(15).roomlp(2000) — huge but rolled off so not muddy.
| Method | Effect |
|---|---|
.delay(0–1) | wet send |
.delaytime(N) | seconds per echo (or 1/4 for quarter note) |
.delayfeedback(0–1) | feedback (>0.7 = chaos) |
Recipe — DJRUM dub tail: .delay(0.6).delaytime(0.625).delayfeedback(0.78) — 5/8 dotted echo, three-tap pingpong.
| Method | Effect |
|---|---|
.distort(N) | hard clip distortion |
.shape(0–1) | wavefolding/shape |
.crush(N) | bitcrush (1–16 bits) |
.coarse(N) | sample rate reduction (lo-fi) |
.overgain(N) | post-gain boost (for clipping) |
Recipe — Skee Mask lo-fi grit: .crush(8).coarse(3).gain(0.4) — 8-bit, decimated, controlled.
| Method | Effect |
|---|---|
.vib(N) / .vibrato(N) | pitch vibrato rate |
.tremolo(N) | amplitude tremolo |
.phaser(N) / .phasersweep(N) | phaser |
.leslie(N) | leslie speaker emulation |
.detune(N) | static or modulated detune (cents) |
Recipe — Floating Points modular drift: .detune(perlin.range(-0.15, 0.15).slow(11)) — slow random pitch drift, the "modular" feel.
| Method | Effect |
|---|---|
.pan(0–1) | static pan |
.pan(sine.range(0.2, 0.8).slow(N)) | auto-pan |
.panspan(N) | per-event pan variation |
| Method | Effect |
|---|---|
.fast(N) / .slow(N) | speed/slow the pattern |
.rev() | reverse |
.palindrome() | forward then reverse |
.degradeBy(0–1) | random drop notes (0.4 = 40% drop) |
.sometimes(fn) | randomly apply fn |
.often(fn) / .rarely(fn) | weighted random apply |
.every(N, fn) | apply fn every N cycles |
.when(cond, fn) | conditional apply |
.jux(fn) | apply fn to right channel only (stereo effect) |
.off(N, fn) | apply fn to a copy offset by N |
.stutter(N) | re-trigger each event N times |
.chunk(N, fn) | divide pattern into N chunks, apply fn to one per cycle |
.ply(N) | repeat each event N times in place |
.brak() | drop every 2nd event |
.struct("1 0 1 1") | gate by external rhythm |
.mask(pattern) | gate by pattern (0/1) |
.chop(N) | slice each event into N pieces |
.striate(N) | interleaved chop |
Recipe — granular crush (Skee Mask): s("piano").chop(16).gain(perlin.range(0.05, 0.25)) — chops a piano hit into 16 tiny grains, random gain per grain.
Recipe — palindrome melodic phrase: note("<C4 Eb4 G4 Bb4>").palindrome() — goes up, then back down.
Recipe — jux variation (stereo trick): .jux(rev) — applies .rev() only to right channel; left stays forward. Wild stereo.
| Method | Effect |
|---|---|
.attack(s) / .atk(s) | attack time (seconds) |
.decay(s) / .dec(s) | decay |
.sustain(0–1) / .sus(N) | sustain level |
.release(s) / .rel(s) | release tail |
.gain(N) | level |
.gate(N) | note duration multiplier |
Recipe — string swell (Kiasmos): .attack(2).sustain(0.5).release(3) — 2s ramp up, half-volume sustain, 3s tail.
The power is COMBINING these. A flat sawtooth becomes a string section with:
note("<C2 G1 Ab1 F1>").s("sawtooth")
.detune(0.1) // body
.attack(0.8).release(2) // swell
.lpf(sine.range(400, 1200).slow(16)) // breathing filter
.lpq(2) // a bit of edge
.room(0.92).roomsize(8) // hall
.delay(0.3).delaytime(0.5).delayfeedback(0.55) // echo tail
.pan(sine.range(0.4, 0.6).slow(11)) // gentle stereo wander
.gain(0.4)
That's a stock sawtooth turned into a real string voice.
If a track sounds flat, ask in order: