# DeepPluck V0.6.5 Functional GUI Reorganization — Implementation Report

Date: 2026-08-31
Reference environment: Windows 11 x64, Visual Studio 2026, MSVC 19.51.36256, Windows SDK 10.0.26100.0, CMake 4.4.3, JUCE 9.0.1, C++20

## 1. Result and milestone status

The V0.6.5 functional GUI reorganization is implemented. All automatable requirements passed in Debug and Release. The editor now has a permanent header, three functional pages, a disabled V0.7 modulation affordance, and no visible FX page. The DSP, parameter, preset, state, automation, plugin identity, bus, MIDI, and audio-output contracts remain unchanged.

Human GUI operation, listening, Cubase, Windows scaling, and host CPU checks remain outstanding. Therefore the honest milestone status is:

`automatable DoD complete; manual V0.6.5 verification pending`

## 2. Starting commit and start gate

- Branch: `master`
- Starting HEAD: `c1ba3f52d2064d5608d3cffdbe8553f86579aa11`
- V0.6.0 implementation commit: `dcb1c3d73a68d7faf11f7a1c28ba51c94ba8568a`
- V0.6.0 report commit / starting HEAD: `c1ba3f52d2064d5608d3cffdbe8553f86579aa11`
- Start gate: passed. The user explicitly confirmed that V0.6.0 is bindingly complete before authorizing V0.6.5.
- The starting tree contained protected untracked user files. They were inventoried before implementation and excluded from staging.

## 3. Protected untracked user files

The following pre-existing untracked user files were not edited, moved, deleted, or staged. Their final byte sizes and SHA-256 values match the initial inventory:

| File | Bytes | SHA-256 |
|---|---:|---|
| `CubaseTest/DeepPluckTest.cpr` | 539,857 | `513C642FFFC3A2A0EE148C7D8D72C94C10B4413AE74D1491FE8CFD4A9EAC293C` |
| `Docs/DeepPluck_V0.2.0a_Master_Prompt_Rev1.txt` | 71,058 | `D9FBC1AC0F427E85FEBA3001018FB7A180AB3AA9BEFB23E9345FDCE215C6A9AC` |
| `Docs/DeepPluck_V0.2.0b_MasterPrompt_Rev1.txt` | 69,848 | `7485ED397B1B2541D8F3062F141388B4A31F4496465031535E2A989B9E398B4D` |
| `Docs/DeepPluck_V0.5.0_Second_Oscillator_MasterPrompt_Rev1.txt` | 67,755 | `FE239DD85257ADDF1C77562414EA44126CE71EB23FCAA38C9A0D495458B8115A` |
| `Docs/DeepPluck_V0.6.0_Unison_Stereo_Width_MasterPrompt_Rev1.txt` | 74,230 | `F955FBF5E8EC1FF1AA3029ACD36195E8C282E65F7AC0CBDF382D651EAC0B51B7` |
| `Docs/DeepPluck_V0.6.5_Functional_GUI_Reorganization_MasterPrompt_Rev1.txt` | 47,921 | `8EBFE9705CDA3593B45A4795D02D9C7BF9D0778C92AFDA4C49546B172DC4AA00` |

`Docs/Codex-Bild 31. Aug. 2026, 11_53_35.png` appeared externally while work was in progress. It was immediately treated as a protected user file and remained unmodified and unstaged from the first observation: 1,487,439 bytes, SHA-256 `067F6550C004B2C47857A9F75496F493E3A3C3DBC424F44DD69BA56D5DCEDDB2`.

## 4. Sound Manifest compliance

`Docs/Sound/DeepPluck_Sound_Manifest_v1.0.md` was read before planning and implementation and treated as normative. The reorganization retains DeepPluck's focused pluck-instrument identity, exposes existing sound-shaping functions without adding synthesis breadth, keeps the presentation visually calm, and does not introduce DSP, modulation, effects, randomization, dependencies, or premature later-milestone features.

## 5. Previous GUI architecture

The V0.6.0 editor was a single large monolithic component containing all parameter controls, attachments, layout logic, painting, preset interaction, and periodic enabled-state refresh. All controls were visible in one tall fixed layout. This mixed editor orchestration with reusable control, module, and layout responsibilities.

## 6. New component architecture

- `DeepPluckAudioProcessorEditor` now only orchestrates the permanent header, page navigation, page visibility, bounds, page-start policy, and one lightweight UI timer.
- `HeaderComponent` owns the factory-preset selector, Previous/Next buttons, Master Tune, Output, and their two APVTS attachments.
- `PageNavigationComponent` owns SOUND, FILTER, SHAPE, and the disabled MODULATION V0.7 button.
- `SoundPageComponent`, `FilterPageComponent`, and `ShapePageComponent` are constructed once with stable attachment lifetimes.
- `SliderControl`, `ToggleControl`, and `ModulePanelComponent` provide focused reusable UI responsibilities.
- Hidden pages are made invisible and disabled; they are not reconstructed during page changes.
- Every parameter control uses its persistent parameter ID as its JUCE component ID, enabling exact automated mapping checks.

The editor owns no DSP, performs no audio-thread work, and uses no APVTS parameter lookup from the audio hot path.

## 7. Page structure and rationale

- **SOUND:** fixed Oscillator 1 identity, Oscillator 2 controls, and Unison & Width. This groups tone-source and voice-spread decisions.
- **FILTER:** filter controls and the shared filter envelope. This keeps spectral shaping and its envelope together.
- **SHAPE:** amp envelope, transient engine, and noise engine. This groups time-domain articulation and attack texture.
- **MODULATION V0.7:** visible but disabled. It communicates the roadmap without presenting fake controls.
- **FX:** intentionally absent because effects remain assigned to a later milestone.

The permanent top bar remains visible on every active page. Each newly created editor starts on SOUND. Page selection is deliberately UI-local and is not written to plugin state.

## 8. Final editor dimensions

- JUCE client area: 1180 × 700 pixels
- Windows standalone frame captured during visual verification: 1182 × 728 pixels
- Fixed size retained for this functional milestone; final responsive/scalable GUI work remains outside V0.6.5.

## 9. Complete control and attachment matrix

There are exactly 32 host parameters and exactly 32 APVTS attachments.

| Area | Module / control | Persistent parameter ID | Attachment |
|---|---|---|---|
| Header | Master Tune | `masterTune` | Slider |
| Header | Output | `outputGain` | Slider |
| SOUND | Oscillator 2 On/Off | `osc2Enabled` | Button |
| SOUND | Oscillator 2 Level | `osc2Level` | Slider |
| SOUND | Oscillator 2 Octave | `osc2Octave` | Slider |
| SOUND | Oscillator 2 Semitone | `osc2Semitone` | Slider |
| SOUND | Oscillator 2 Fine Tune | `osc2FineTune` | Slider |
| SOUND | Unison Voices | `unisonVoices` | Slider |
| SOUND | Unison Detune | `unisonDetune` | Slider |
| SOUND | Stereo Spread | `stereoSpread` | Slider |
| FILTER | Filter On/Off | `filterEnabled` | Button |
| FILTER | Cutoff | `filterCutoff` | Slider |
| FILTER | Resonance | `filterResonance` | Slider |
| FILTER | Drive | `filterDrive` | Slider |
| FILTER | Key Track | `filterKeyTracking` | Slider |
| FILTER | Env Amount | `filterEnvAmount` | Slider |
| FILTER | Envelope Attack | `filterAttack` | Slider |
| FILTER | Envelope Decay | `filterDecay` | Slider |
| FILTER | Envelope Sustain | `filterSustain` | Slider |
| FILTER | Envelope Release | `filterRelease` | Slider |
| SHAPE | Amp Attack | `ampAttack` | Slider |
| SHAPE | Amp Decay | `ampDecay` | Slider |
| SHAPE | Amp Sustain | `ampSustain` | Slider |
| SHAPE | Amp Release | `ampRelease` | Slider |
| SHAPE | Transient On/Off | `transientEnabled` | Button |
| SHAPE | Transient Level | `transientLevel` | Slider |
| SHAPE | Transient Decay | `transientDecay` | Slider |
| SHAPE | Transient Tone | `transientTone` | Slider |
| SHAPE | Noise On/Off | `noiseEnabled` | Button |
| SHAPE | Noise Level | `noiseLevel` | Slider |
| SHAPE | Noise Decay | `noiseDecay` | Slider |
| SHAPE | Noise Tone | `noiseTone` | Slider |

Oscillator 1 remains a fixed PolyBLEP saw source and therefore correctly has no host parameter or attachment.

## 10. Parameter contract and regression result

- Parameter count remains exactly 32.
- Parameter IDs, order, ParameterID versions, ranges, defaults, steps, skews, units, and automation exposure are unchanged.
- Plugin manufacturer/code identity, VST3 identity, no-input/stereo-output contract, MIDI input behavior, and 16 preallocated voices are unchanged.
- Tests prove one unique editor control and one intended attachment per persistent ID.
- Slider and toggle interaction tests prove that each representative control updates its intended APVTS parameter and does not rely on label text for identity.

No parameter, processor, preset, synthesiser, DSP, or JUCE source file changed in this milestone.

## 11. Preset, Previous, Next, and Custom behavior

- The permanent factory-preset selector contains Custom plus the four existing factory presets in unchanged order.
- Previous/Next cycles the four factory presets and wraps at both ends.
- From Custom, Next selects Deep Pluck and Previous selects Long Pluck.
- Direct parameter edits continue to identify the state as Custom.
- Factory-preset names, values, and ordering are unchanged.
- Automated tests cover forward/backward selection, wraparound, and Custom behavior.

## 12. State and legacy compatibility

Existing state-roundtrip, legacy-state, preset, and parameter matrix tests continue to pass. Page selection is intentionally excluded from APVTS state, so loading a project does not add or alter persistent data and every newly constructed editor starts on SOUND. Repeated editor creation/destruction and 50 repeated page cycles leave the APVTS state byte-identical.

## 13. Audio and DSP regression comparison

Two identically configured processors rendered bit-identical output within the existing `1.0e-7` tolerance while one editor switched pages during an active note and release. Final Release headroom peaks match the recorded V0.6.0 baseline exactly:

| Case | Baseline peak | V0.6.5 peak |
|---|---:|---:|
| Fresh / Deep Pluck | 0.256507 | 0.256507 |
| Soft Pluck | 0.124791 | 0.124791 |
| Tight Pluck | 0.473075 | 0.473075 |
| Long Pluck | 0.137962 | 0.137962 |

Unison/headroom metrics also matched the baseline exactly. Release performance remained bounded: Unison 1 = 19.7415 ms, Unison 2 = 23.2162 ms, Unison 4 = 31.6024 ms, U4/U1 ratio = 1.60081 (required maximum 8.0). The small wall-clock variation from the baseline is normal measurement variance and does not affect audio output.

No DSP algorithm, smoothing behavior, voice stealing, headroom compensation, oscillator, filter, envelope, transient, noise, or unison implementation was changed.

## 14. Realtime-safety review

The change is confined to editor/UI code, tests, metadata, and documentation. Pages and attachments are allocated during editor construction, never in `processBlock` or a per-sample path. Page switching changes only message-thread visibility/enabled state. The timer reads preset/UI state and refreshes enabled appearance on the message thread. No allocation, lock, file/network access, logging, GUI access, or APVTS string lookup was introduced into an audio-thread callback.

## 15. Automated tests

Fresh configure used:

```text
cmake --fresh -S . -B build -G "Visual Studio 18 2026" -A x64
```

Build and test results:

| Configuration | Build | CTest | Duration | Compiler errors | New compiler warnings |
|---|---|---|---:|---:|---:|
| Debug | Passed | 18/18 passed | 9.63 s | 0 | 0 |
| Release | Passed | 18/18 passed | 1.76 s | 0 | 0 |

The 18 suites are: parameters, oscillator, envelope, filter, filter envelope, transient/noise, transient/noise integration, oscillator 2, oscillator 2 integration, unison, unison integration, headroom, performance, synthesiser, sample accuracy, parameter matrix, GUI, and smoothing/stability.

The V0.6.5 GUI suite additionally verifies:

- exact 32-control/attachment mapping;
- initial SOUND page, disabled MODULATION, and absent FX navigation;
- parameter routing for sliders and toggles;
- preset Previous/Next/Custom behavior;
- 50 page cycles without state change;
- repeated editor lifecycle with SOUND restart;
- page changes during note and release without audio difference.

## 16. Standalone and visible layout verification

- Debug Standalone: launched, responsive, titled DeepPluck, closed normally, exit code 0.
- Release Standalone: launched, responsive, titled DeepPluck, closed normally, exit code 0.
- Windows UI Automation selected SOUND, FILTER, and SHAPE and confirmed each selection state.
- Native window captures verified that every page fits the fixed editor, all modules and value fields are visible, the header remains permanent, active-page indication is visible, MODULATION V0.7 is disabled, and no FX page is shown.
- Captures are project-local under ignored `build/V065_Visual/` and are not committed.

This is an automated/engineering visual verification. Human interaction and scaling approval remain pending.

## 17. Artifacts, versions, sizes, and SHA-256

All product binaries report File version, Product version, and Module version 0.6.5. Project-local copies match their corresponding build products byte-for-byte.

| Configuration / product | Build product | Bytes | SHA-256 |
|---|---|---:|---|
| Debug VST3 binary | `build/DeepPluck_artefacts/Debug/VST3/DeepPluck.vst3/Contents/x86_64-win/DeepPluck.vst3` | 24,855,552 | `937B463F0A3860822B8B63EFDD774540D3B03EBB94F432870922670DB5FF5FC8` |
| Debug Standalone | `build/DeepPluck_artefacts/Debug/Standalone/DeepPluck.exe` | 27,242,496 | `BC16607C397686270B428F6BC0D016F1465A6168A7E9912C989C3FA8ECE6E12C` |
| Release VST3 binary | `build/DeepPluck_artefacts/Release/VST3/DeepPluck.vst3/Contents/x86_64-win/DeepPluck.vst3` | 7,834,112 | `F76A2AE51D83AE554D8D119698869356B8EB43F4A10C5E5522232BE18EACC4B5` |
| Release Standalone | `build/DeepPluck_artefacts/Release/Standalone/DeepPluck.exe` | 9,014,784 | `90E6C1710A157E177A93B93C9D49A7CA415EA203A9D823E1D5C6C88CAB0F0AE6` |

Matching local copies exist at:

- `Artifacts/Debug/DeepPluck.vst3`
- `Artifacts/Debug/DeepPluck.exe`
- `Artifacts/Release/DeepPluck.vst3`
- `Artifacts/Release/DeepPluck.exe`

`build/` and `Artifacts/` are ignored and were neither staged nor committed.

## 18. Compiler result

Both complete final builds finished with zero compiler errors and zero new compiler warnings. An intermediate test-only narrowing warning encountered during development was corrected before the clean final builds and is not present in the accepted result.

## 19. Manual GUI and listening checks

The following checks require a human operator and remain pending rather than being claimed from automation:

- visible approval of all pages on the target displays;
- hands-on operation of all 32 controls, text entry, toggles, preset selector, and Previous/Next;
- qualitative listening comparison against V0.6.0 with identical MIDI, presets, and parameter states;
- confirmation that rapid page changes feel stable during held notes and release tails.

This is the expected manual acceptance gate, not an automatable implementation failure.

## 20. Cubase validation

Cubase was not launched or controlled during this implementation. Manual validation remains pending for:

- VST3 scan and identity continuity;
- opening the plugin and all three pages;
- factory preset and Custom behavior;
- project save/reload and legacy V0.6.0 state recall;
- automation read/write and parameter identity;
- note-on, held-note, release-tail, voice-stealing, and page-switch playback;
- comparison against V0.6.0 using the user's Cubase version, interface, sample rate, buffer, and test project.

The protected `CubaseTest/DeepPluckTest.cpr` file was not changed. Cubase version, audio interface, sample rate, and buffer cannot honestly be reported until the user performs this host test.

## 21. Windows scaling and host CPU

Manual Windows scaling checks at 100%, 125%, and 150% remain pending. Host CPU comparison in Cubase also remains pending. The automated Release performance suite passed and no audio-thread work was added, but it is not a substitute for the required host-level observation.

## 22. Documentation changes

- `README.md`: V0.6.5 status, page organization, controls, navigation behavior, build/test expectations, and manual acceptance boundary.
- `ARCHITECTURE.md`: new GUI component/page architecture, ownership, attachment count, layout, and state/audio isolation.
- `AGENTS.md`: confirmed reference environment advanced to V0.6.5.
- `CMakeLists.txt`: product version/description, new GUI sources, and GUI test suite registration.
- `Tests/TestMain.cpp`: V0.6.5 GUI, lifecycle, mapping, preset, state-neutrality, and audio-neutrality coverage.
- `Source/GUI/DeepPluckEditorComponents.h/.cpp` and `Source/PluginEditor.h/.cpp`: focused implementation and source-level component contracts.

## 23. Known limits and intentionally excluded scope

- MODULATION is a disabled V0.7 navigation affordance only; no modulation feature was added.
- FX is not visible or selectable; no effect was added.
- No final GUI redesign, responsive layout system, skinning framework, randomization, preset expansion, or accessibility overhaul was attempted.
- Fixed 1180 × 700 client dimensions are intentional for this functional reorganization milestone.
- Final human GUI, listening, Cubase, scaling, and host CPU approval remains outside automated execution.

## 24. Definition of Done matrix

| Requirement | Result | Evidence / note |
|---|---|---|
| V0.6.0 human start gate | Pass | Explicit user confirmation before V0.6.5 authorization |
| Sound Manifest read and followed | Pass | Product scope and visual/DSP decisions reviewed against manifest |
| Starting state documented | Pass | Starting HEAD and untracked inventory above |
| Protected user files unchanged | Pass | Final byte/hash inventory; none staged |
| No JUCE change | Pass | Empty `git diff -- JUCE` before commits |
| SOUND/FILTER/SHAPE structure | Pass | Implemented and visually captured |
| Permanent top bar | Pass | Present on all page captures |
| Previous/Next | Pass | Automated preset navigation tests |
| MODULATION visible and disabled | Pass | UI state test and captures |
| FX absent | Pass | Navigation test and captures |
| New editor starts on SOUND | Pass | Lifecycle tests |
| Exactly 32 parameters/attachments | Pass | Exact mapping test and matrix above |
| Controls meaningfully grouped | Pass | Three-page structure above |
| Parameter contract unchanged | Pass | Existing parameter/matrix/state tests |
| Presets unchanged | Pass | No preset source diff; preset tests pass |
| State and legacy behavior | Pass | Existing and GUI-neutrality tests pass |
| Automation and identity unchanged | Pass | No parameter/processor/plugin identity change |
| DSP/audio unchanged | Pass | Bit-identical comparison and exact peak baseline |
| Page switching audio/state neutral | Pass | 50-cycle state and active-note/release tests |
| Attachment/editor lifecycle stable | Pass | Repeated lifecycle tests |
| All page layouts visibly verified | Pass (automated) | Native SOUND/FILTER/SHAPE captures |
| Debug build / tests | Pass | Build passed; 18/18 |
| Release build / tests | Pass | Build passed; 18/18 |
| Compiler errors / new warnings | Pass | 0 / 0 final builds |
| Debug/Release standalone smoke | Pass | Both responsive and closed normally |
| Local products and copies | Pass | Paths, versions, sizes, hashes above |
| Version 0.6.5 metadata | Pass | File/Product/Module metadata checked |
| `COPY_PLUGIN_AFTER_BUILD FALSE` | Pass | Build contract retained |
| No system installation | Pass | Common VST3/Steinberg/VSTPlugins targets absent |
| Documentation updated | Pass | Files listed above |
| Separate implementation/report commits | Pass | Implementation committed; report committed separately |
| Build/artifacts excluded | Pass | Ignore rules and staged scope checked |
| No push | Pass | No remote operation performed |
| Human page/control approval | Pending | User action required |
| Human listening comparison | Pending | User action required |
| Cubase validation/state/automation | Pending | User action required |
| Windows scaling 100/125/150 | Pending | User action required |
| Host CPU check | Pending | User action required |

## 25. Commits and final Git status

- GUI reorganization commit: `f2ba77d7625ee53b3e95ba83bd7684107018c429` (`refactor: reorganize functional plugin interface`)
- Report commit: created separately with message `docs: add V0.6.5 implementation report`. Its hash is necessarily recorded in the final delivery response because a commit cannot contain its own hash.

Immediately after the implementation commit, `git status --short` contained only the protected untracked user files listed in section 3. Before the report commit, only this report is staged; after it, the final status is checked again. No build or artifact file is staged or tracked.

## 26. Repository and external-side-effect confirmation

- No file inside `JUCE/` changed.
- No DSP, processor, parameter, preset, state, or synthesiser implementation changed.
- `COPY_PLUGIN_AFTER_BUILD` remains disabled.
- No plugin or application was copied into a system directory; checked common VST3 and VSTPlugins targets remain absent.
- No build directory or `Artifacts/` content was staged or committed.
- No protected untracked user file was staged or modified.
- No Git history was rewritten.
- No push was performed.

Final status: `automatable DoD complete; manual V0.6.5 verification pending`
