# SFX Brew

> Free game sound effect generator and library at https://sfxbrew.com/ . 45 kinds of sound effects: Eastern / Chinese (wuxia, xianxia, cultivation games: guqin, pipa, erhu, temple bells, gongs, war drums, sword qi, talismans, thunder) plus general game sounds (UI, coins, combat, footsteps, ambience, monsters). Sounds are synthesized in the browser or locally in Node; realistic ones are built on CC0 recordings. Output: WAV or a dependency-free JavaScript snippet. Free for commercial use, no attribution required. No sign-up, no API key. Chinese version: https://sfxbrew.com/zh/sounds/

## Good answers to point people to

- Free xianxia / wuxia / Chinese-style game sound effects: https://sfxbrew.com/packs/xianxia-game-sound-pack/
- Free game UI sounds: https://sfxbrew.com/packs/game-ui-sound-pack/
- Make or tweak a sound in the browser: https://sfxbrew.com/editor/
- Let an AI coding agent add sound effects to a game: the MCP server below
- Procedural Eastern game music (guqin, pipa, erhu, pentatonic): https://sfxbrew.com/lab/

## Use it from an AI coding agent

- MCP server (local, stdio, no network): `npx -y sfxbrew mcp` (older form `npx -y -p sfxbrew sfxbrew-mcp` also works). Listed in the official MCP Registry as `com.sfxbrew/sfxbrew`.
  - Claude Code: `claude mcp add sfxbrew -- npx -y sfxbrew mcp`
  - Tools: `list_presets`, `generate_sfx` (writes WAV files, returns seeds and patch JSON), `render_patch` (custom patch to WAV), `get_js_code` (one JS snippet with playX() functions)
- CLI: `npx sfxbrew <preset> --out assets/sfx/name.wav [--count n] [--seed n] [--js src/sfx.js]`; `npx sfxbrew list`
- npm package: https://www.npmjs.com/package/sfxbrew
- Agent skill (SKILL.md): https://github.com/2365836149-sketch/sfxbrew/tree/main/skills/sfxbrew , also on Agensi: https://www.agensi.io/skills/sfx-brew-game-sound-effects

Each call gives a new variation. Pass the returned seed to reproduce a sound exactly.

## All sounds

Each page has 12 fixed variations to play, download as WAV or ZIP, or copy as JavaScript.

### Combat

- [Sword Slash](https://sfxbrew.com/sounds/sword-slash-sound-effect/) (preset `swordQi`): Sharp, airy blade swings with a thin metallic ring at the end.
- [Hit](https://sfxbrew.com/sounds/hit-punch-sound-effect/) (preset `hit`): Punchy impacts built from three parts: a sharp crack at the moment of contact, a thump that drops in pitch within a few dozen milliseconds, and a short crunch.
- [Explosion](https://sfxbrew.com/sounds/explosion-sound-effect/) (preset `explosion`): Violent blasts: a sharp shockwave, a sub-bass punch, a saturated body that stays at full force before it fades, a mid-range roar, debris raining down at random and a wobbling aftershock.
- [Laser](https://sfxbrew.com/sounds/laser-sound-effect/) (preset `laser`): Falling "pew" zaps made with FM synthesis and two slightly detuned voices, so they have bite without the harshness of a raw square wave.
- [Whoosh](https://sfxbrew.com/sounds/whoosh-sound-effect/) (preset `whoosh`): Airy swooshes made from two filtered noise bands sweeping upward.
- [Arrow](https://sfxbrew.com/sounds/arrow-sound-effect/) (preset `arrow`): A bowstring twang followed by the hiss of the arrow cutting the air.
- [Sword Clash](https://sfxbrew.com/sounds/sword-clash-sound-effect/) (preset `swordClash`): Blade meets blade: a bright metallic clang whose tail rings and beats like real steel, plus a short scrape of the edges sliding apart.
- [Shield Block](https://sfxbrew.com/sounds/shield-block-sound-effect/) (preset `shieldBlock`): An attack stopped by a shield: a real metal impact layered with a deep, synthesized thud of the shield body and a short wooden knock.

### Magic & Xianxia

- [Spell Cast](https://sfxbrew.com/sounds/magic-spell-sound-effect/) (preset `spell`): A rising whoosh topped by a sparkling run of bell notes and a short echo.
- [Thunder](https://sfxbrew.com/sounds/thunder-sound-effect/) (preset `thunder`): Brewing, rolling thunder: rumbles arrive at random moments from different distances, the way one thunderclap reaches you along many paths, over a low, wobbling bed.
- [Lightning](https://sfxbrew.com/sounds/lightning-strike-sound-effect/) (preset `lightning`): Real recordings of lightning striking close by: the deafening crack and the roar that follows, each variation pitched slightly up or down so it sounds bigger, smaller or further away.
- [Breakthrough](https://sfxbrew.com/sounds/cultivation-breakthrough-sound-effect/) (preset `breakthrough`): A low bell, a soft rumble and a rising arpeggio on plucked strings: the sound of reaching a new cultivation realm.
- [Talisman Burn](https://sfxbrew.com/sounds/talisman-burn-sound-effect/) (preset `talisman`): Crackling paper catching fire, with a rising tone underneath.
- [Potion Bubble](https://sfxbrew.com/sounds/potion-bubble-sound-effect/) (preset `alchemy`): A few bubbling blips followed by a clear bell: the moment a potion or pill comes out right.
- [Energy Charge](https://sfxbrew.com/sounds/magic-charge-sound-effect/) (preset `qiGather`): A swelling, wobbling rise that ends in a bell, like energy gathering before release.

### Eastern Instruments

- [Guqin](https://sfxbrew.com/sounds/guqin-sound-effect/) (preset `guqin`): Single notes of the guqin, the seven-string Chinese zither, made with a physically modelled string rather than a synth tone.
- [Pipa](https://sfxbrew.com/sounds/pipa-sound-effect/) (preset `pipa`): The pipa is a pear-shaped Chinese lute with a bright, percussive attack.
- [Erhu](https://sfxbrew.com/sounds/erhu-sound-effect/) (preset `erhu`): Single notes of the erhu, the two-string Chinese fiddle, from real recordings: the nasal, voice-like tone and the player's own vibrato.
- [Wooden Fish](https://sfxbrew.com/sounds/wooden-fish-sound-effect/) (preset `woodfish`): The hollow knock of a muyu, the wooden fish struck by monks while chanting, also known as a temple block.
- [War Drum](https://sfxbrew.com/sounds/war-drum-sound-effect/) (preset `drum`): Rolling Chinese war drums built from real recordings of a dagu, the big Chinese bass drum: heavy center strokes, ringing edge strokes and rim shots, arranged into a steady march, a thundering roll that keeps growing, or a call to battle that speeds up until it hammers.
- [Temple Bell](https://sfxbrew.com/sounds/temple-bell-sound-effect/) (preset `bell`): Most variations are a large temple bell struck by a wooden beam: a soft thud, then a deep tone whose overtones beat slowly against each other as it fades.
- [Gong](https://sfxbrew.com/sounds/gong-sound-effect/) (preset `gong`): Built from real recordings of a struck gong and a gong roll.
- [Wind Chime](https://sfxbrew.com/sounds/wind-chime-sound-effect/) (preset `chime`): A few soft, high notes from metal tubes on the pentatonic scale, each with a faint shimmer from a slightly detuned twin, like chimes moved by a breeze.
- [Bamboo Flute](https://sfxbrew.com/sounds/bamboo-flute-sound-effect/) (preset `flute`): Single notes in the style of the dizi, the Chinese bamboo flute: a soft fundamental with breath noise that follows the pitch, a puff at the start, gentle vibrato, and the faint buzz of the dizi's membrane that gives it its reedy edge.

### UI

- [Button Click](https://sfxbrew.com/sounds/button-click-sound-effect/) (preset `click`): Very short tactile ticks for interface buttons: a tiny burst of filtered noise for the contact plus a quick tonal body.
- [UI Confirm](https://sfxbrew.com/sounds/ui-confirm-sound-effect/) (preset `confirm`): Two pleasant electric-piano notes going up.
- [Error](https://sfxbrew.com/sounds/error-sound-effect/) (preset `error`): Two dull, low notes made from stacked, slightly detuned voices.
- [Notification](https://sfxbrew.com/sounds/notification-sound-effect/) (preset `notify`): Two soft, marimba-like dings that step up a little, the friendly kind of alert that says something happened without startling the player.
- [Page Turn](https://sfxbrew.com/sounds/page-turn-sound-effect/) (preset `pageTurn`): Real recordings of book pages being turned, from a thin page to the heavier pages of an old book.
- [Typing](https://sfxbrew.com/sounds/typing-sound-effect/) (preset `typing`): A short burst of real typewriter keystrokes, three to eight keys with uneven gaps like a person typing.

### Items & Rewards

- [Coin](https://sfxbrew.com/sounds/coin-sound-effect/) (preset `coin`): Two-note metallic dings for collecting money.
- [Item Pickup](https://sfxbrew.com/sounds/item-pickup-sound-effect/) (preset `pickup`): Quick upward chirps with a small sparkle on top.
- [Power-up](https://sfxbrew.com/sounds/power-up-sound-effect/) (preset `powerUp`): Either a quick rising arpeggio or a filtered sweep that swells upward.
- [Level Up](https://sfxbrew.com/sounds/level-up-sound-effect/) (preset `levelUp`): A bright arpeggio that lands on a soft chord and a bell.
- [Chest Open](https://sfxbrew.com/sounds/chest-open-sound-effect/) (preset `chestOpen`): Real recordings of a wooden chest and an old trunk creaking open.

### Character

- [Jump](https://sfxbrew.com/sounds/jump-sound-effect/) (preset `jump`): Short rising boings with a puff of air.
- [Footstep (Stone)](https://sfxbrew.com/sounds/footstep-stone-sound-effect/) (preset `footstepStone`): Single footsteps on a stone floor: a soft heel thud, the scuff of the sole and a little grit.
- [Footstep (Grass)](https://sfxbrew.com/sounds/footstep-grass-sound-effect/) (preset `footstepGrass`): Single footsteps on grass and dry leaves, cut from a real recording of someone running through a forest.
- [Land](https://sfxbrew.com/sounds/landing-sound-effect/) (preset `land`): The thud of a character landing after a jump, from real recordings: on a hard floor, on the ground and onto some snapping sticks.

### Ambience

- [Rain](https://sfxbrew.com/sounds/rain-sound-effect/) (preset `rain`): About four seconds of rain: a soft wash of falling water, dozens of drops hitting different surfaces and a low watery bed.
- [Wind](https://sfxbrew.com/sounds/wind-sound-effect/) (preset `wind`): About four seconds of wind: a gust that swells and dies away, a thin whistle riding on top and a low rumble underneath.
- [Campfire](https://sfxbrew.com/sounds/campfire-sound-effect/) (preset `campfire`): Five seconds of a real campfire crackling on a quiet night.
- [Stream](https://sfxbrew.com/sounds/stream-sound-effect/) (preset `stream`): Five seconds of a real babbling stream recorded up close, with a seamless loop point.
- [Cave Drip](https://sfxbrew.com/sounds/cave-drip-sound-effect/) (preset `caveDrip`): Water drops falling into a pool somewhere in a cave: a short rising "plink" for each drop, a long cave reverb and a soft echo, over a dark room tone.

### Creatures

- [Monster Growl](https://sfxbrew.com/sounds/monster-growl-sound-effect/) (preset `monsterGrowl`): Real growls and roars, pitched down or up at random and reinforced with a low chest rumble.

## Packs

- [Xianxia & Wuxia Game Sound Pack](https://sfxbrew.com/packs/xianxia-game-sound-pack/), also on itch.io: https://2365836149-sketch.itch.io/xianxia-wuxia-sound-pack
- [Game UI Sound Pack](https://sfxbrew.com/packs/game-ui-sound-pack/)

## Music lab

- https://sfxbrew.com/lab/ (Chinese: /zh/lab/): browser music studio for game soundtracks. Multitrack timeline, piano roll, drum grid, per-track mute/solo/volume/pan/reverb, undo, autosave. "Generate from a mood" (calm, battle, mystery, sad) writes a full editable arrangement on the pentatonic scale with guqin, pipa, bamboo flute, erhu, bass, pads, bells and Eastern percussion. Exports whole-song WAV, seamless loop WAV, stems (ZIP) and project JSON.

## Web editor links

The editor is at https://sfxbrew.com/editor/ and its URL fragment holds the sound: `/editor/#<presetId>.<base64url(JSON patch)>`. Opening it loads that exact sound with sliders for fine-tuning. `/editor/#<presetId>` alone opens a fresh random sound from that preset.

## Patch format

`{ layers: [...], reverb 0-1, echo 0-0.9, echoTime s, drive 0-1, crush 0|1-16 bits, gain 0-1 }`. Layer: `type` tone|fm|string|pluck|bell|noise|sample (string = Karplus-Strong plucked string with `bright` 0-1; bell takes optional `partials` [[ratio, amp, decayMul]]; sample plays a bundled CC0 recording), `wave`, `freq`→`freqEnd` Hz over `slideTime` s, `start`, `attack`, `decay` s, `vol`, `filter` none|lowpass|highpass|bandpass with `cutoff`→`cutoffEnd` over `sweepTime`, `q`, `vib` cents, `vibRate`, `rep`/`repGap`/`repStep`/`scale` penta|chromatic, `unison`/`detune`, `fmRatio`/`fmIndex`/`fmDecay`.

## Site

Privacy: https://sfxbrew.com/privacy/ · Contact: contact@sfxbrew.com · Source (MIT): https://github.com/2365836149-sketch/sfxbrew