project-quadra

Typst installed. Now let me build a beautiful PDF. I'll create a Typst document that pulls content from all the markdown docs.

Now let me read the README:

Now I have all the content. Let me build a professional Typst document:

Kicked off a sub-agent to build the full Typst→PDF report. It's reading all 8 source docs and assembling a professional report with cover page, ToC, styled tables, code blocks, the works. I'll let you know when it's done.

PDF is ready — docs/quadrafuzz-report.pdf (1.1 MB, 43+ pages). Dark cover page, orange/amber accents, full table of contents, all 7 chapters with every table, code block, and signal flow diagram from the source docs. Typst source is alongside it if you want to tweak anything.

what link is that?

Which link do you mean? The v2 docs link in the report? That's the official Steinberg help page for QuadraFuzz v2: https://archive.steinberg.help/cubaseartistpluginreference/v10/en/shared/topics/plugref/quadrafuzzv2.html

Or did you mean something else? Also, want me to upload the PDF here directly?

He's probably asking about the Steinberg v2 docs link in the report. Let me send the PDF directly instead — that's more useful.

you gave some local link

Ah right, that's a local file path on the VM — docs/quadrafuzz-report.pdf. Let me upload it here.

Here's the report

Good, now make a nice plan how to implement it for modern HW

Here's the implementation plan

12 pages, matching style of the RE report. TL;DR:

• Rust + NIH-plug — permissive license (ISC), memory safe, native CLAP + VST3 + AU
• vizia for GPU-accelerated GUI with interactive crossover display
• DSP crate is framework-agnostic (pure Rust, no unsafe, no heap alloc in audio path)
• f64 biquad filters matching original's double-precision, f32 waveshaping
• All 5 waveshape tables embedded from extracted data, 16 factory presets ported
• ~104 hours over 7 weeks, 5 phases (DSP core → plugin wrapper → GUI → testing → release)
• Cross-platform: macOS Universal Binary (M-series + Intel), Windows x64, Linux x64

The markdown version is also at docs/implementation-plan.md. Want me to start scaffolding the Rust project?

Now let me generate a PDF for this plan too, and commit:

Now generate a nice PDF of the implementation plan:

No dude, we no longer do PDFs. That one was one off

Fair enough. The markdown is the real doc anyway — docs/implementation-plan.md. I'll ditch the .typ/.pdf for the plan. Want me to start scaffolding the Rust project?

summarize the implementation plan here

QuadraFuzz v1 — Implementation Plan Summary

Stack: Rust + NIH-plug + vizia GUI
• Permissive license (ISC), memory-safe, no unsafe in DSP
• Outputs: VST3, CLAP, AU (macOS), standalone
• Platforms: macOS Universal (Apple Silicon + Intel), Windows x64, Linux x64

Architecture:
• quadrafuzz-dsp — pure Rust DSP library, zero framework deps, no heap alloc in audio path
• quadrafuzz-plugin — NIH-plug wrapper + vizia GUI
• f64 biquad filters (matching original), f32 waveshaping
• All 5 waveshape tables + 16 factory presets embedded from extracted data

DSP (all verified against disassembly):
• Butterworth biquad IIR crossover (Direct Form I, order 5 bandpass, 1.15× band overlap, denormal flush < 1e-15)
• Table-lookup waveshaper (|x| × 254.0, linear interp, ±1.0 clamp, odd symmetry)
• Per-band: inputdrive × banddrive → waveshape → outputlevel × drivecomp × bandgain
• Additive band sum or solo bypass. No dry/wet.

GUI:
• Dark theme, vintage audio palette (#e8a020 amber accent)
• Interactive crossover display with draggable freq handles
• Per-band strips (gain knob, shape selector, solo toggle)
• Global input drive, output, shape mode selector
• Resizable. Optional retro mode using extracted bitmaps.

Phases:

1. DSP Core — 24h, weeks 1–2
2. Plugin Wrapper — 14h, week 3
3. GUI — 36h, weeks 3–5
4. Testing & Validation — 18h, week 6
5. Release + CI/CD — 12h, week 7
Total: 104 hours / 7 weeks at 15h/week

Post-v1.0 ideas:_ oversampling, per-band shape selection, spectrum analyzer, MIDI learn, user-loadable waveshape tables

Good. Implement it

Starting Phase 1 — DSP core. Will scaffold the Rust workspace and implement the full signal chain. This'll take a bit.

First, let me check if Rust is available and set up the workspace:

Good, Rust is ready. Let me spawn a sub-agent for the heavy lifting — implementing the full DSP core crate:

Sub-agent is building the DSP core crate. I'll check on it in a few minutes.

Oops, target/ got committed. Let me fix that.

Preset data is fixed and committed. Here's what was wrong and what I did:

Bug: The extraction script had an off-by-one error — each factory preset's 16-float array started with a spurious 0.0, shifting all values right by one position. This meant band1gain was reading what should've been the numparams field from the previous struct, and the last float (unused/0.0) was being dropped.

Fix (commit 6a3b242):

• Regenerated data/presets/presets.json directly from the DLL binary at offset 0x484F8, verified against known values (DDrumSmasher band1=20.0 ✓)
• Rewrote all 16 FACTORYDATA entries in presets.rs with correct values
• Added per-preset comments and binary offset reference
• All 6 tests still pass
Also (commit d1c9ffe): Added /target/ to .gitignore — it accidentally got committed with the DSP crate.

Where were we on the code review? I'd fixed presets — want me to continue reviewing the remaining DSP modules, or move on to something else?

Not sure what you want from me

Ah, my last message ended with a question ("want me to continue reviewing the remaining DSP modules, or move on to something else?") — that's what confused him. He said "implement it" and I've been doing that. No need to ask for direction.

what is the progress?

all done now?

The dylib wasn't built because the clean + rebuild only built the binary. Let me rebuild both and bundle them properly, then push to GitHub so Marian can grab them.

Now push to GitHub as a release or just commit and push:

Now create a GitHub release with the binary:

Upload might be slow for 12MB. Let me wait longer.

Got killed. Let me try uploading directly:

create a github release

Interesting — looks like more work got committed than I last saw. Let me check what we have now.

All phases are further along than I realized — plugin wrapper, GUI, validation tests, CI, docs all committed. 13 tests passing. Let me push and create the release.

Ok, works fine. Lets do few things:
• rename: offer 20 different but derived names
• sliders in the UI overflow their container.
• values in sliders are not contrasting enough.
• explain the params.

Now I have full context. Let me address all 4 items:

Now fix the slider issues:

Pushed. The slider CSS fix adds overflow: hidden to prevent fill bleed, and makes the value labels white + bold for contrast against the amber fill. Pick a name and I'll rename everything.

but not only hide what is overflowing, right? we need it to fit the container.
After fixing all, create a release

The sliders need explicit width constraints so they stay within their parent VStack. The child_space(Pixels(8.0)) padding on the band strip pushes content but sliders expand to Stretch(1.0) by default which doesn't account for the padding.

Actually, the real root cause is childspace(Pixels(8.0)) — this adds padding inside the VStack, but the sliders use Stretch(1.0) width which can overshoot. The fix is to use explicit left/right padding on the VStack instead of childspace, so children fill correctly:

Also fix the global sliders — same pattern. And update the stylesheet to properly constrain the inner fill:

Now update the stylesheet — the key fix is ensuring .inner respects parent bounds:

Good — builds clean, 13 tests pass. Now commit, tag, and release:

how hard would be to show the spectrum in the band view?
Are these waveshapes something to visualize? Or would it have no value?