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Knurl follows the played note and treats every cycle of the wave on its own: a repeating level pattern over 1-16 cycles makes subharmonics in tune with every note, random level and timing per cycle add rattle, and a noise burst per cycle, highpassed at a multiple of f0, adds grit. Amounts are counted in cycles, so the texture is the same on F1 and on C2. - Cycle clock from the shared note tracker, restarted at each note; the audio is delayed by the lookahead plus 4.2 ms of timing-jitter headroom. - Per-cycle randomness from a hash of the cycle number: Same every note or Free. - Patterns Off, Double, Triple, Fry (default), Gallop, Stutter or drawn; grit switchable per step. Pattern persisted as knurl-pattern. - Editor: last eight cycles overlaid, pattern bars with the playing step. - Tests match the prototype: Double gives f0/2 at -8.19 dB, Triple f0/3 at -10.68 dB, equal on F1 and C2, no added clicks, bit-exact when off, no allocation on the audio thread.
197 lines
10 KiB
Markdown
197 lines
10 KiB
Markdown
# Bass Foundry
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**Rust CLAP plugins for writing, designing and mixing bass music in FL Studio.**
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Riddim and dubstep basses change patch on every switch-up. Fixed-frequency tools
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then act differently on every note: the sub jumps, an EQ cut lands on another
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harmonic, the distortion gets fizzy on one note and dull on the next. Most plugins
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in this suite follow the played note, so a setting means the same thing on every
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note. Each plugin is a separate product with its own version, guide and release.
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## Plugins
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| Plugin | What it does | Load it on | Latency | Docs |
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| --- | --- | --- | --- | --- |
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| **[Rivet](docs/rivet/README.md)** | Tells a MIDI motif as a story on a storyboard of roles and joins the seams into one phrase | Channel Rack | none | [Guide](docs/rivet/README.md) · [Changes](docs/rivet/CHANGELOG.md) |
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| **[Patina](docs/patina/README.md)** | Smooths harsh, ringing resonances while plain harmonic tone and transients pass | Any mixer track | one analysis frame | [Guide](docs/patina/README.md) · [Changes](docs/patina/CHANGELOG.md) |
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| **[Anvil](docs/anvil/README.md)** | Replaces the sub with a clean mono sine: one level and one start phase on every note | Bass bus | 80 ms | [Guide](docs/anvil/README.md) · [Changes](docs/anvil/CHANGELOG.md) |
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| **[Crucible](docs/crucible/README.md)** | Records the last bars all the time, then slices, cleans and exports key-labelled samples with one button | End of the chain to resample | none | [Guide](docs/crucible/README.md) · [Changes](docs/crucible/CHANGELOG.md) |
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| **[Lathe](docs/lathe/README.md)** | EQ with one band on each harmonic of the played note: a cut on harmonic 3 stays on harmonic 3 | Bass, after the synth | ≈ 67 ms | [Guide](docs/lathe/README.md) · [Changes](docs/lathe/CHANGELOG.md) |
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| **[Temper](docs/temper/README.md)** | Distortion that drives every note the same: level and tone filters follow the note | Bass | ≈ 67 ms + oversampling | [Guide](docs/temper/README.md) · [Changes](docs/temper/CHANGELOG.md) |
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| **[Weld](docs/weld/README.md)** | Phase-aligns one bass layer to another layer through the sidechain, so the layers sum in the mids instead of cancelling | One layer's track, other layer as sidechain | none | [Guide](docs/weld/README.md) · [Changes](docs/weld/CHANGELOG.md) |
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| **[Knurl](docs/knurl/README.md)** | Gives every cycle of the note its own level, timing and grit: in-tune subharmonic growl, rattle and fry on every note | Bass | ≈ 71 ms | [Guide](docs/knurl/README.md) · [Changes](docs/knurl/CHANGELOG.md) |
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Plugins with latency report it to the host, so FL Studio compensates the delay.
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Anvil, Lathe, Temper and Knurl detect pitch from the audio. They can also take the
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pitch from MIDI.
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The names come from metalwork: a **rivet** joins pieces; **patina** changes a
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surface and keeps its character; an **anvil** is the solid base that everything
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is struck on; a **crucible** melts material down to be cast again; a **lathe**
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turns a piece so each cut lands the same all the way round; **tempering** sets
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how hard and how tough a metal ends up; a **weld** fuses two pieces into one;
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**knurling** presses a ridged grip pattern into a surface.
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The suite is the **foundry**: the workshop where the bass gets cast, shaped and
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finished. Hosts list the plugins under the vendor name *Bass Foundry*.
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## Editors
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<table>
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<tr>
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<td width="50%"><a href="docs/rivet/README.md"><img src="docs/rivet/assets/editor.png" alt="Rivet editor"></a><br><b>Rivet</b>: storyboard composition</td>
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<td width="50%"><a href="docs/patina/README.md"><img src="docs/patina/assets/editor.png" alt="Patina editor"></a><br><b>Patina</b>: resonance smoothing</td>
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</tr>
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<tr>
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<td><a href="docs/anvil/README.md"><img src="docs/anvil/assets/editor.png" alt="Anvil editor"></a><br><b>Anvil</b>: sub anchor</td>
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<td><a href="docs/crucible/README.md"><img src="docs/crucible/assets/editor.png" alt="Crucible editor"></a><br><b>Crucible</b>: resampler</td>
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</tr>
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<tr>
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<td><a href="docs/lathe/README.md"><img src="docs/lathe/assets/editor.png" alt="Lathe editor"></a><br><b>Lathe</b>: harmonic EQ</td>
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<td><a href="docs/temper/README.md"><img src="docs/temper/assets/editor.png" alt="Temper editor"></a><br><b>Temper</b>: tracked distortion</td>
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</tr>
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<tr>
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<td><a href="docs/weld/README.md"><img src="docs/weld/assets/editor.png" alt="Weld editor"></a><br><b>Weld</b>: layer phase alignment</td>
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<td><a href="docs/knurl/README.md"><img src="docs/knurl/assets/editor.png" alt="Knurl editor"></a><br><b>Knurl</b>: cycle texture</td>
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</tr>
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</table>
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The previews are rendered headless from the real editor code by
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`tools/editor-check`, so they match what the plugin draws.
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## Install
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1. Open the plugin's release on Gitea. Every plugin has its own release tag,
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for example `lathe-v0.1.0`.
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2. Download `<plugin>-windows-x86_64-<version>.zip`. You can check it against
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the `.zip.sha256` file next to it.
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3. Extract the ZIP and copy the `.clap` file into:
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```text
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C:\Program Files\Common Files\CLAP\
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```
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4. In FL Studio 2024.1 or newer, open **Options → Manage plugins**, enable
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**Verify plugins**, and click **Find installed plugins**.
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5. Load Rivet in the Channel Rack. Load the other plugins in mixer effect slots.
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Keep the font license (`licenses/`) with redistributed packages.
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Every branch and pull-request pipeline also builds a combined Windows preview
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ZIP, `bass-foundry-windows-x86_64.zip`, in its **windows** job. Use it to test unreleased changes.
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> **Upgrading from Motif Storyboard or Resonance Compressor?** These are now
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> Rivet and Patina. The CLAP IDs and saved state are unchanged, so projects
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> still load. Delete the old `.clap` files and rescan. The vendor name changed
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> from "Rivet & Patina" to "Bass Foundry", so FL Studio may list the plugins
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> in a new vendor folder after the rescan.
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## Build from source
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You need:
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- Rust stable and Python 3.11 or newer.
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- For the Windows target on Linux: the `x86_64-pc-windows-gnu` Rust target and
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MinGW (`x86_64-w64-mingw32-gcc`).
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- For the native wrapper tests on Linux: pkg-config and the X11/XCB and OpenGL
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development headers. Rivet's optional standalone also needs ALSA/JACK headers.
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```sh
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# Tests for all engines, editors and tools
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cargo test --workspace --locked
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# Formatting, tests and lints for one product, including its CLAP wrapper
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python3 scripts/check-plugin.py --plugin lathe
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# Windows build, then the ZIPs (all plugins, or --plugin <name>)
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python3 scripts/build-plugin.py --plugin lathe --target x86_64-pc-windows-gnu
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python3 scripts/package-windows.py
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# Headless editor preview
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cargo run --manifest-path tools/editor-check/Cargo.toml -- target/editor/lathe.png --plugin lathe
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```
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Plugin names for the scripts are `rivet`, `patina`, `anvil`, `crucible`,
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`lathe`, `temper`, `weld` and `knurl`. Builds go to `dist/<target>/<Name>.clap`. No
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script installs anything into a DAW. [Development and testing](docs/development.md)
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has the full command list.
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## Quality checks
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Every push and pull request runs these checks in CI
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(`.gitea/workflows/check.yml`):
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- **Engine tests.** Every engine has tests for its signal behaviour and latency
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against measured targets.
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- **Realtime safety.** Every audio effect has a test that fails if the audio
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thread allocates memory.
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- **Host tests.** Each wrapper is loaded through the exported CLAP ABI, without
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a DAW. The tests check the ports, the reported latency, state save and load,
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and processing at 44.1, 48 and 96 kHz.
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- **Lints.** `rustfmt` and `clippy -D warnings` for every package and wrapper.
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- **Editor previews.** All editors are rendered headless and kept as CI
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artifacts.
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- **Windows builds.** Every `.clap` is cross-compiled and packaged.
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Release ZIPs are deterministic and contain checksums for every file. Things CI
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cannot check stay manual: FL Studio routing, native window behaviour, and
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listening.
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## Repository
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```text
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plugins/
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catalog.json Product metadata for the build, check and release tools
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rivet/ core · midi · app · preview · plugin
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patina/ core · ui · render · plugin
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anvil/ core · ui · plugin
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crucible/ core · ui · plugin
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lathe/ core · ui · plugin
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temper/ core · ui · plugin
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weld/ core · ui · plugin
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knurl/ core · ui · plugin
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common/
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ui/ Shared look: palette, embedded fonts, knobs, panels, meters
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dsp/ Shared filters, pitch tracking, oversampling, meters, WAV files
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tools/editor-check/ Headless editor renderer for visual QA
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scripts/ Build, check, packaging, release and analysis tools
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docs/<plugin>/ Guide, changelog and editor preview for each plugin
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docs/ideas.md Problems in bass-music production and the plugin ideas for them
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references/ Local reference audio; never distributed
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```
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Each product follows the same split:
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- `core` is the engine. It is plain Rust, does not depend on a plugin SDK, and
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is tested on its own.
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- `ui` is the egui editor, built on `common-ui`.
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- `plugin` is the CLAP wrapper on a pinned NIH-plug revision.
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The root Cargo workspace holds the engines, editors and tools. Each wrapper is
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its own workspace with its own lockfile, so SDK dependencies stay separate.
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`plugins/catalog.json` is the single list of products. The scripts and CI read
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it, so adding a plugin starts there.
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## Releases
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Each plugin is versioned and released on its own. Its version is the `version`
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in `plugins/<plugin>/plugin/Cargo.toml`. A tag `<plugin>-v<version>`, for example
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`temper-v0.1.0`, starts the release workflow. The workflow builds, checks and
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publishes that plugin's Windows ZIP to a Gitea release. See
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[docs/releases.md](docs/releases.md).
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## Roadmap
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[docs/ideas.md](docs/ideas.md) lists the production problems the suite targets,
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the released plugins and the ideas for the next ones.
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## License
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ISC, see [LICENSE](LICENSE). The embedded Roboto Condensed fonts are under the
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SIL Open Font License ([OFL.txt](plugins/common/ui/assets/OFL.txt)).
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