# ZHILA Sound is terrain. A sampling instrument where material is cut in a quarry, laid as stones in a nave, and played by a hand or an agent through the same verbs. This repository is **P1d**: the engine, the wire, the descent, the material room, a project that survives a restart, a microphone, and a waveform you can cut. A found or recorded sound is cut into sixteen faces by hand or by analysis, laid on a vein and heard in the loop; tempo, gains, pattern and face edits are autosaved and reversible. The visual demo in [`reference/demo`](reference/demo) remains a design reference, not the codebase. The roadmap is in [`docs/PLAN.md`](docs/PLAN.md). ![The quarry](preview-p1-quarry.png) ![The Tauri window](preview-tauri.png) ![P1b · restored project](preview-p1b-restored.png) ![P1c · a recorded take](preview-p1c-record.png) ![P1d · a cut and trimmed core](preview-p1d-faces.png) ## What is real - **Rust engine.** `cpal` output at 48 kHz, five veins, a sixteen-step phrase, a fixed voice pool, per-vein levels and gains, a bar clock. Procedural voices for empty pattern rows; real sample voices for rows with a face. No Web Audio. - **Material.** Import through the local wire; `symphonia` decodes WAV/FLAC/MP3/OGG; onset analysis finds seams and cuts sixteen faces with RMS, rank and waveform peaks; the archive keeps the mono f32 samples. The sample rate is preserved and the engine handles the playback ratio. - **Project.** A portable folder: `project.db` (SQLite) plus `assets/`. On daemon start it loads the cores, pattern, tempo, gains and journal; every project edit autosaves. The default is `~/.local/share/zhila/descent-04`; use `--project PATH` for another. The project name is shown in the top rail. - **Undo/redo.** Tempo, gains and pattern steps/faces push a small history; `Ctrl/⌘+Z` and `Shift+Ctrl/⌘+Z`, or the rail buttons. The journal records every edit. History is per session: after a reload the project is restored, the undo stack starts empty. - **Recording.** `record` in the quarry opens the microphone, captures mono PCM through an AudioWorklet, encodes a 16-bit WAV in the surface and sends it through the same import path. The take becomes a core with sixteen faces, seal `recorded`, and is autosaved in the project. Stops at 30 s; no monitoring. - **Quarry editing.** Drag any of the seventeen seams on the waveform: the inner seams recut the sixteen faces, the outer seams trim the playable range. The core recomputes RMS and rank from the samples; the engine hears the new ranges on the next trigger; the project stores the cuts; the edit is undoable. - **Quarry.** Import, core strip, zoomed waveform with face boundaries, sixteen-face wall, face audition, seal and stats; assign a face to a pattern row; edit the sixteen steps; strike a face; all against the live session. - **Protocol v1.** JSON control frames, a 31-byte binary meter frame, and a binary import path (an import header followed by the audio bytes). Snapshot, results, events, token and origin guard. - **Session + journal.** Validation, revisions, a journal for project edits (tempo, gains, pattern faces and steps); play, stop and strikes are performance, not history. - **Surface.** A Svelte 5 descent whose terrain, eye, city, road, stones and playhead react to the five levels and the master; a real wire log; engine facts; cilia; a master signal trace; vein gains; transport; keyboard. - **Verification.** Rust unit tests, a live wire test, a material import test, a browser quarry test and the P0 regression smoke, plus `svelte-check` and a production build. The Tauri 2 shell is **built and running**: a native window loading the same surface, connected to the daemon. It is built with Tauri 2.12.5 / CLI 2.12.4 against WebKitGTK 2.54.2, GTK 3.24.52 and dbus 1.16.2. The binary is `app/src-tauri/target/release/zhila-app` (13 MB); installers are a later step. ## Quick start Requirements: Rust (tested on 1.99), Node 22, ALSA. The daemon uses the default output device; without one it reports offline and the surface still connects. ```bash ./scripts/dev.sh ``` Open **http://127.0.0.1:5173**. The daemon listens on `ws://127.0.0.1:4317` with the development token `dev`. Or the two halves separately: ```bash cargo run -p zhila-daemon -- --port 4317 npm --prefix ui run dev ``` ### Try the material loop 1. Open **quarry** in the top rail. 2. `take a core` and choose a WAV (a short field recording works; the fixture `fixtures/clicks-01.wav` is one). 3. The file is decoded, the seams are found and sixteen faces are cut. Or press `record`, speak/play into the microphone, press `stop`; the take arrives the same way. Click a face, then `lay on bass`. 4. `space` plays the loop; the bass row now triggers the sample while the other veins keep their procedural voices. Edit steps in the pattern; each edit goes to the engine and the journal. 5. Go back to **nave** to see the pattern on the road and the levels in the room. ### Tauri ```bash npm --prefix ui run build cd app ./node_modules/.bin/tauri build --no-bundle ./src-tauri/target/release/zhila-app ``` The built window embeds the surface and connects to the daemon at `ws://127.0.0.1:4317`; start the daemon first. `tauri dev` uses the Vite server at `127.0.0.1:5173`. The engine is still the separate daemon in this phase. Rebuild the native app after any UI change; the binary embeds `ui/dist` at compile time. The recording and cutting UI are in the shared surface; WebKitGTK microphone permission still needs a manual check on this machine. Controls: `space` play/stop · `s` strike the selected face in the quarry or the selected vein in the nave · `1`–`5` select a vein (nave) or a pattern row (quarry) · click a face to select, double-click to strike · tempo `−` / `+`. The daemon prints the audio device, rate, buffer and session id. Use `--no-audio` for UI/protocol tests, `--port` to change the port, and `ZHILA_TOKEN` or `--token` to change the dev token. The surface reads `VITE_ZHILA_WS` and `VITE_ZHILA_TOKEN` at build time. ## Layout ``` crates/zhila-protocol wire types, binary meter frame, cores/faces, tests crates/zhila-core session, journal, material snapshot, engine trait crates/zhila-engine cpal stream, procedural + sample voices, levels crates/zhila-material decode, onset analysis, sixteen faces, peaks crates/zhila-project SQLite project, assets, load/save, undo persistence crates/zhila-daemon WebSocket daemon, auth, binary import, autosave ui Svelte 5 surface: descent + quarry fixtures a small click track for the smoke tests app Tauri 2 shell (built; engine remains the daemon) docs plan, protocol, P0/P1 notes reference/demo the earlier design demo ``` ## Tests ```bash ./scripts/check.sh # fmt, clippy, cargo tests, svelte-check, build node scripts/wire-smoke.mjs # daemon running node scripts/material-smoke.mjs # daemon running: import, face, play node scripts/persistence-smoke.mjs # spawned daemon: import/edit/undo/restart npm --prefix ui run smoke # daemon + Vite: P0 regression, screenshots npm --prefix ui run quarry-smoke # daemon + Vite: import, assign, play, screenshots npm --prefix ui run project-smoke # daemon + Vite: project, undo, import, screenshots npm --prefix ui run record-smoke # daemon + Vite: fake microphone take, faces, seal npm --prefix ui run faces-smoke # daemon + Vite: drag a seam, trim, save, screenshot npm --prefix ui run restored-smoke # after restarting the daemon on the saved project ``` `npm --prefix ui run smoke` writes `preview-p0*.png`; `quarry-smoke` writes `preview-p1-*.png`. ## P1d limits (next, not hidden) - The project persists, but undo history does not: after a reload the undo stack starts empty. The journal is stored for audit, not reconstructed into undo. - Recording is mono, 16-bit, requested 48 kHz, up to 30 s, no monitoring and no input device choice. WebKitGTK/Tauri microphone permission is untested; the browser path is verified with Chromium's fake capture. - Face editing is seventeen contiguous cuts: no zoom, fades or per-face loop points. The trim is the outer pair of cuts; the source bytes are untouched. - The Tauri binary still embeds an older surface and starts no engine; it is a viewer in this phase. - One fixed two-bar phrase and five veins; pattern rows are veins, one face per row, no per-step face or pitch. - The Tauri binary currently embeds an older surface build; rebuild it after UI changes (`npm --prefix ui run build`, then `tauri build`). The engine remains the separate daemon. - Formats depend on symphonia; WAV is the tested path. AIFF, multi-channel files and very long files are not specifically handled. - No agent/MCP in this phase. - The Tauri shell now builds and runs; the engine is still the separate daemon (embedding is next). The next slice is P1e: undo history across reloads and the engine host inside the Tauri backend. Then the arrangement and the agent. The plan is in [`docs/PLAN.md`](docs/PLAN.md); the phase notes are in [`docs/P1.md`](docs/P1.md).