pulp

Features

Plugin Formats

• VST3, Audio Unit v2, AUv3, CLAP, LV2, Standalone
• WAM / WebCLAP browser targets (experimental)
• Optional AAX support via external SDK

Create & Build

• pulp create scaffolds a full plugin project with the default native targets for your platform
• pulp build builds all formats in one pass
• pulp test runs the local test suite (ctest over the project's build directory); cross-platform execution and coverage roll up to CI — coverage is tracked at codecov.io/gh/danielraffel/pulp
• pulp run launches standalone for quick iteration
• pulp doctor checks your environment and reports missing dependencies

UI & Design

• JS-scripted GPU UIs via Dawn, Skia, and QuickJS
• CSS Flexbox + Grid layout engine with 81 CSS properties
• Responsive design via matchMedia queries
• 15+ widgets: Knob, Fader, Toggle, TextEditor, ComboBox, XYPad, WaveformView, SpectrumView, and more
• Hot reload for rapid UI iteration (standalone host; plugin host support planned)
• Screenshot capture and headless rendering
• Component inspector for debugging view hierarchy
• AI-assisted design tool (pulp design) for token, shader, and widget-style iteration
• Design import from Figma/Figma plugin, Stitch, v0, Pencil/OpenPencil, Claude Design, and DESIGN.md exports
• Agent-first motion observability — runtime traces, fixture record/replay/assert, visual analysis, Swift + Kotlin facades, scrubber, cost attribution (guide)

DSP & Audio

• 30+ signal processors: oscillator, filters, compressor, reverb, delay, FFT, envelope follower, and more
• Thread-safe parameter system with atomic reads and gesture-aware bindings
• Headless audio processing for testing and offline rendering
• MIDI I/O with parsed short messages, SysEx, UMP helpers, and documented backend limits
• Audio file import for WAV, AIFF/AIFF-C, FLAC, MP3, Ogg Vorbis, and CoreAudio-backed Apple formats
• Audio file export for WAV/AIFF, with optional FLAC, MP3, AAC, and ALAC encoders via pulp add
• Multi-bus I/O with sidechain support

Rendering

• GPU rendering via Dawn + Skia Graphite (Metal, D3D12, Vulkan)
• CoreGraphics fallback on macOS/iOS
• SkSL runtime shaders for custom GPU effects
• SDF shape primitives for resolution-independent drawing
• Waveform and spectrum visualization widgets
• Headless screenshot capture for CI and validation

Shipping

• Code signing and notarization on macOS
• DMG and PKG installer creation
• Appcast generation for Sparkle auto-updates
• Semantic versioning baked into the build
• pulp ship sign, pulp ship package, pulp ship check