suna

A delay effect VST3/AU plugin with MoonBit DSP compiled to WebAssembly, running via WAMR in JUCE.

Features

• Delay Time: 0-2000ms with smooth interpolation
• Feedback: 0-100% for echo trails
• Mix: 0-100% dry/wet blend
• Dual Runtime: Native plugin (JUCE + WAMR AOT) and Web version (AudioWorklet + WASM)
• Shared UI: Vue 3 interface embedded in both native and web builds
• Single DSP Core: MoonBit compiled to WASM, shared across all platforms

Architecture

                    ┌─────────────────┐
                    │  Shared UI      │
                    │   (Vue 3)       │
                    └────────┬────────┘
                             │
              ┌──────────────┴──────────────┐
              │                             │
      ┌───────┴───────┐             ┌───────┴───────┐
      │    Native     │             │     Web       │
      │  (JUCE C++)   │             │  (Browser)    │
      └───────┬───────┘             └───────┬───────┘
              │                             │
      ┌───────┴───────┐             ┌───────┴───────┐
      │   WAMR AOT    │             │  WebAssembly  │
      │   Runtime     │             │   Runtime     │
      └───────┬───────┘             └───────┴───────┘
              │                             │
              └──────────────┬──────────────┘
                             │
                    ┌────────┴────────┐
                    │   WASM DSP      │
                    │   (MoonBit)     │
                    └─────────────────┘

Quick Start (macOS)

# Install dependencies
brew install cmake ninja ccache node
xcode-select --install
curl -fsSL https://cli.moonbitlang.com/install/unix.sh | bash

# Setup (includes LLVM build, ~30 min first time)
git submodule update --init --recursive
npm run setup:macos

# Build & install plugin
npm run release:vst

Development

Web Version

npm run setup:web
npm run dev:web      # localhost:5173

Native Plugin

npm run build:dsp    # MoonBit → WASM → AOT
npm run release:vst  # Build VST3/AU

Project Structure

suna/
├── dsp/           # MoonBit DSP source
├── plugin/        # JUCE C++ plugin
├── ui/            # Vue 3 UI (shared)
├── libs/          # JUCE, WAMR submodules
└── scripts/       # Build automation

npm Scripts

Script	Description
setup:web	Install UI dependencies
setup:juce	Build DSP + install deps
dev:web	Vite dev server
build:dsp	MoonBit → WASM → AOT
release:web	Production web build
release:vst	Build VST3/AU

Troubleshooting

Plugin not recognized by DAW

Build on macOS, not Docker:

npm run release:vst

wamrc build fails

Re-run setup:

rm -rf libs/wamr/core/deps/llvm libs/wamr/wamr-compiler/build
npm run setup:macos

License

MIT