dsh-midi-studio · 零依赖音乐制作插件

Zero-dependency music production plugin for DeepSeek Harness (dsh).

MIDI 作曲 + 演奏效果注入（弯音/CC/力度/人性化）+ FluidSynth WASM 渲染 WAV/MP3 + 多轨混音。 MIDI composition + performance-effects injection (pitch bend / CC / velocity / humanize) + FluidSynth WASM rendering to WAV/MP3 + multitrack mixing.

对方机器零外部依赖：FluidSynth 2.4.6 以 WebAssembly 打包在 npm 依赖里（js-synthesizer，引擎以 asm.js 内嵌于 externals，无独立 .wasm 文件），无需安装任何引擎、Python、ffmpeg；音色库首次使用时自动下载（GeneralUserGS.sf3，8.4MB）到本地缓存，全平台（Windows/macOS/Linux）。渲染速度实测 100+ 倍实时（3.8s 曲目约 33ms 渲染，引擎初始化后）。

Zero external dependencies on the target machine: FluidSynth 2.4.6 ships as WebAssembly inside the npm dependency (js-synthesizer; the engine is embedded as asm.js in its externals — no standalone .wasm file), so no engine, Python, or ffmpeg install is needed. The soundfont (GeneralUserGS.sf3, 8.4 MB) auto-downloads to a local cache on first use, all platforms. Rendering is measured at 100+× realtime (~33 ms for a 3.8 s track after engine init).

特性 · Features

工具注册名统一为 _dsh_external_dsh_midi_studio_* 全名（harness 不做名字缩短，模型按注册名调用）。 Tool registration names are the full _dsh_external_dsh_midi_studio_* (the harness does not shorten names; the model calls the registered names).

架构 · Architecture

_dsh_external_dsh_midi_studio_compose ─┐
                                        ├→ .mid ── _dsh_external_dsh_midi_studio_effects ── _dsh_external_dsh_midi_studio_render ── .wav/.mp3
                                        │                       (效果在 MIDI 数据层，渲染 100% 保留)
                                        └── _dsh_external_dsh_midi_studio_edit（改谱，免重写整曲）
_dsh_external_dsh_midi_studio_mix ◄────┴── 多轨 WAV 混音（人声+伴奏等）

• 渲染引擎：js-synthesizer（FluidSynth 2.4.6 WASM，BSD-3/LGPL，with-libsndfile 支持 .sf2/.sf3）
  • 引擎日志（fluid_stat stub 等噪音）已通过 disableLogging(Error) 静音，保留 Panic 级；真实失败以异常/渲染统计（peak≈0）暴露
  • Rendering engine: js-synthesizer (FluidSynth 2.4.6 WASM, BSD-3/LGPL, with-libsndfile for .sf2/.sf3). Engine log noise is silenced via disableLogging(Error) (Panic level kept); real failures surface as exceptions / render stats (peak ≈ 0).
• MP3：lamejs（纯 JS LAME 移植）· MP3: lamejs (pure-JS LAME port)
• 混音/裁剪/归一：自研纯 TS PCM 处理（重采样为线性插值，无抗混叠——音乐混音场景足够）· Mix/trim/normalize: self-written pure-TS PCM processing (linear-interpolation resampling, no anti-aliasing — sufficient for music mixing)
• MIDI 读写：自研 SMF 解析器（绝对 tick 缓冲排序，规避 delta-time 踩坑）· MIDI I/O: self-written SMF parser (absolute-tick buffered sorting, avoiding delta-time pitfalls)

效果参数速查表 · Effects quick reference

常用 CC 号 / Common CC numbers：1 颤音调制 mod wheel · 7 音量 volume · 10 声像 pan（0 左/64 中/127 右）· 11 表情 expression · 64 延音踏板 sustain · 91 混响发送 reverb send · 93 合唱发送 chorus send

典型配方 / Typical recipes：

• 弦乐渐强 String crescendo：cc_line CC11 0→127（4 拍）+ velocity_line 40→110
• 吉他揉弦 Guitar vibrato：pitchbend_curve depth=±80 cycles=3
• 钢琴踏板 Piano pedal：sustain 0→16（每乐句一踩 per phrase）
• 鼓组拟人 Drum humanize：humanize amount=6 timing=0.02

典型工作流 · Typical workflow

compose（写谱）→ effects（弯音/CC/力度/人性化）→ render（出 WAV/MP3）
                └→ edit（改谱：移调/力度/平移/删除，免重写整曲）
多轨成品 → mix（人声+伴奏，gain/pan/归一化 → WAV/MP3）

轨道索引约定 · Track index conventions

• compose 默认生成指挥轨（track 0，含速度/标题），音乐轨从 track 1 起；conductor: false 时无指挥轨，track 0 即第一个音乐轨 compose emits a conductor track by default (track 0, tempo/title), music tracks start at track 1; with conductor: false there is no conductor track and track 0 is the first music track.
• effects/edit 的 track 支持负索引（-1 = 最后一轨）；缺省 = 全部轨 track in effects/edit supports negative indices (-1 = last track); default = all tracks.
• 目标轨无音符/无通道事件时会输出 ⚠ 警告，不再静默失效 A ⚠ warning is emitted when the target track has no notes/channel events — no more silent no-ops.

安装 · Installation

仓库即标准 dsh bundle 包（@dsh-external/dsh-midi-studio），克隆后直接安装：

The repo is a standard dsh bundle package (@dsh-external/dsh-midi-studio) — clone and install:

git clone https://github.com/zeroa234/dsh-midi-studio
cd dsh-midi-studio
npm install
dsh plugin --profile web add .

安装后重启 harness，新会话的工具列表里就会出现 _dsh_external_dsh_midi_studio_* 七个工具。

After a harness restart, the seven _dsh_external_dsh_midi_studio_* tools appear in new sessions.

配置 · Configuration

覆盖方式（profile 的 cordis.patch.yml 或预设配置）· Override in the profile's cordis.patch.yml or a preset config:

- id: dsh-midi-studio
  name: '@dsh-external/dsh-midi-studio'
  config:
    soundfontDir: 'D:\soundfonts'
    defaultGain: 0.4

测试 · Tests

npm test   # node:test（零依赖），40 用例覆盖 SMF round-trip/通道分配/效果/编辑/混音/WASM 渲染

WASM 渲染集成测试（tests/render.test.js）在无音色库缓存时自动跳过（skip），有缓存（~/.dsh-music-studio/soundfonts/ 或 DSH_MUSIC_SOUNDFONT）时真实验证「MIDI → 非静音立体声 WAV」整链路。 The WASM render integration test (tests/render.test.js) auto-skips without a soundfont cache; with one it verifies the full "MIDI → non-silent stereo WAV" chain.

音色库 · Soundfonts

• 自动下载：GeneralUserGS.sf3（jsDelivr CDN），缓存于 ~/.dsh-music-studio/soundfonts/ Auto-download: GeneralUserGS.sf3 (jsDelivr CDN), cached in ~/.dsh-music-studio/soundfonts/
• 或自备 .sf2/.sf3 放入缓存目录 / 设置环境变量 DSH_MUSIC_SOUNDFONT / render 时传 soundfont 路径 Or bring your own .sf2/.sf3 into the cache dir / set DSH_MUSIC_SOUNDFONT / pass a soundfont path to render.

构建与注入（开发）· Build & inject (development)

dev_build_plugin     # DSH_CHECKOUT 需可用（本机：C:\Users\bmh05\dsh-harness，junction → E:\dsh\harness）
dev_inject_plugin    # 首次注入前先手动建 profile junction，否则包解析负缓存会永久污染该包名
dev_install_package  # 持久化：写入 profile package.json（link 依赖 + dsh.profile.bundles），重启不丢

踩坑记录（本机注入）：loader 的包解析负缓存按路径永久失效——包名一旦有过「junction 缺失时」的失败解析，之后该名字的解析永远失败（legacyMainResolve → index.js）。对策：新包名必须「先建 junction，再首次解析」。 Pitfall (local injection): the loader's package-resolution negative cache fails permanently by path — once a name has a failed resolution (junction missing), that name always fails afterwards. Fix: create the junction before first resolution.

持久化：dev_inject_plugin 只做运行时注入（registry.json），重启会丢；要跨重启存活，需 dev_install_package 把包写进 profile 的 dsh.profile.bundles（启动时正常装配）。两者并存安全：super-injector 启动恢复时会跳过已有 active entry 的包（hasActiveEntry），不会双加载。 Persistence: dev_inject_plugin is runtime-only (registry.json) and lost on restart; use dev_install_package to write the package into the profile's dsh.profile.bundles (normal assembly at startup). Both can coexist safely: super-injector skips packages with an active entry on startup recovery (hasActiveEntry), so no double-loading.

仓库结构 · Repository layout

dsh-midi-studio/
├── src/               # TypeScript 源码：工具注册 + lib/* 核心逻辑 · Tool registration + core logic
│   ├── index.ts
│   └── lib/           # compose / edit / effects / render / smf / soundfont / wav
├── lib/               # 构建产物（仓库内提交，克隆即用）· Built output (committed, clone-and-use)
├── tests/             # node:test 用例（零依赖）· node:test suites (zero deps)
├── scripts/
│   └── build.sh       # 构建脚本（DSH_CHECKOUT 自动探测）· Build script (auto-probes DSH_CHECKOUT)
├── package.json
├── README.md
└── LICENSE

许可证 · License

BSD-3-Clause