docs(phase-05): complete phase execution
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@@ -4,7 +4,7 @@ milestone: v1.1
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milestone_name: Custom Sound Mappings
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status: verifying
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stopped_at: Completed 05-02-PLAN.md
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last_updated: "2026-03-26T16:39:38.288Z"
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last_updated: "2026-03-26T16:42:31.293Z"
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last_activity: 2026-03-26
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progress:
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total_phases: 3
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@@ -25,8 +25,8 @@ See: .planning/PROJECT.md (updated 2026-03-26)
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## Current Position
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Phase: 05 (waveform-types-and-bank-decoupling) — EXECUTING
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Plan: 2 of 2
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Phase: 6
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Plan: Not started
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Status: Phase complete — ready for verification
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Last activity: 2026-03-26
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@@ -0,0 +1,126 @@
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---
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phase: 05-waveform-types-and-bank-decoupling
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verified: 2026-03-26T00:00:00Z
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status: passed
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score: 12/12 must-haves verified
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re_verification: false
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gaps: []
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human_verification: []
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---
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# Phase 5: Waveform Types and Bank Decoupling Verification Report
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**Phase Goal:** Add waveform types (sine, square, sawtooth, triangle) with bandlimited synthesis; decouple OscillatorBank from global config for custom sound mapping injection.
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**Verified:** 2026-03-26
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**Status:** passed
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**Re-verification:** No — initial verification
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---
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## Goal Achievement
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### Observable Truths
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Plan 01 truths:
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| # | Truth | Status | Evidence |
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|----|-------|--------|----------|
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| 1 | WaveformType enum exists with five values: WaveformCustom (0), WaveformSine, WaveformSquare, WaveformSawtooth, WaveformTriangle | VERIFIED | `synth/config.go` lines 16-24: `type WaveformType int` with five `iota` constants in correct order |
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| 2 | WaveformPresetHarmonics returns correct bandlimited harmonic series for each waveform type | VERIFIED | `synth/config.go` lines 29-59: correct loop logic for each waveform; all 9 waveform tests pass |
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| 3 | All generated partials are below Nyquist frequency (22050 Hz) | VERIFIED | `TestBandlimitedHarmonicsNoAliasing` iterates all ClassFreqConfigs × all 4 waveform types — passes |
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| 4 | WaveformCustom returns nil, preserving existing hand-tuned harmonics | VERIFIED | `synth/config.go` line 33: `case WaveformCustom: return nil`; `TestWaveformPresetHarmonics_Custom` passes |
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| 5 | NewLayer resolves waveform presets at construction time, not at render time | VERIFIED | `synth/layer.go` lines 25-27: preset resolution at top of `NewLayer`; `TestNewLayerResolvesWaveformPreset` and `TestSineRegressionVsCustomHarmonics` pass |
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| 6 | Existing tests still pass — no regression in v1.0 behavior | VERIFIED | `go test ./...` — all 6 packages pass (aggregate, capture, classify, cmd/netsynth, encode, synth) |
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Plan 02 truths:
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| # | Truth | Status | Evidence |
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|----|-------|--------|----------|
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| 7 | NewBank accepts a config map parameter instead of reading the ClassFreqConfigs global | VERIFIED | `synth/bank.go` line 17: `func NewBank(tau float64, cfgs map[classify.TrafficClass]FreqConfig) *OscillatorBank` |
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| 8 | GainPerLayer is computed dynamically as 1.0/len(configs) inside NewBank | VERIFIED | `synth/bank.go` line 21: `gainPerLayer: 1.0 / float64(len(cfgs))`; `TestNewBankDynamicGain` asserts `b.gainPerLayer == 1.0/3.0` for 3-class config |
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| 9 | RenderWindow iterates b.layers instead of classify.AllClasses() in both loops | VERIFIED | `synth/bank.go` lines 42-55: both loops use `range b.layers`; `classify.AllClasses()` absent from bank.go |
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| 10 | encode.RunSynthesis passes synth.ClassFreqConfigs as the default config map | VERIFIED | `encode/mp3.go` line 57: `bank := synth.NewBank(1.0, synth.ClassFreqConfigs)` |
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| 11 | All 14 built-in classes still produce the same audio output as v1.0 | VERIFIED | `TestNewBankHas14Layers`, `TestMixerNoClip`, `TestMultipleWindowsEMAConvergence`, `TestStereoPan` all pass |
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| 12 | No-clip guarantee holds with dynamic gain scaling | VERIFIED | `TestMixerNoClip` (14-class), `TestNewBankCustomConfigNoClip` (2-class) both pass |
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**Score:** 12/12 truths verified
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---
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### Required Artifacts
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| Artifact | Provides | Status | Details |
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|----------|----------|--------|---------|
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| `synth/config.go` | WaveformType enum and WaveformPresetHarmonics function | VERIFIED | Exports all 5 enum values, `WaveformPresetHarmonics`, and `FreqConfig.WaveformType` field |
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| `synth/layer.go` | Waveform resolution in NewLayer | VERIFIED | Lines 25-27 resolve presets at construction; `WaveformPresetHarmonics` called correctly |
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| `synth/waveform_test.go` | Tests for waveform preset generation and bandlimiting | VERIFIED | 12 test functions including all specified behavioral tests |
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| `synth/bank.go` | Decoupled OscillatorBank with injected config map | VERIFIED | `gainPerLayer` field present, `NewBank` takes `cfgs` param, both `RenderWindow` loops use `b.layers` |
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| `encode/mp3.go` | Updated NewBank call site | VERIFIED | Line 57 passes `synth.ClassFreqConfigs` as second arg |
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| `synth/bank_test.go` | Updated tests for new NewBank signature | VERIFIED | All calls are two-argument; `TestNewBankDynamicGain` and `TestNewBankCustomConfigNoClip` present |
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| `synth/config_test.go` | Updated TestNumLayersMatchesAllClasses | VERIFIED | Line 62: asserts `len(synth.ClassFreqConfigs) == len(classify.AllClasses())`; no reference to `synth.NumLayers` |
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---
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### Key Link Verification
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| From | To | Via | Status | Details |
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|------|----|-----|--------|---------|
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| `synth/layer.go` | `synth/config.go` | `NewLayer` calls `WaveformPresetHarmonics(cfg.WaveformType, cfg.BaseHz, sampleRate)` | WIRED | Line 26: exact call present; conditional on `cfg.WaveformType != WaveformCustom` |
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| `encode/mp3.go` | `synth/bank.go` | `synth.NewBank(1.0, synth.ClassFreqConfigs)` | WIRED | Line 57: exact pattern matches; no single-arg NewBank calls anywhere in codebase |
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| `synth/bank.go` | `synth/layer.go` | `NewLayer(cfg, SampleRate, tau)` for each config map entry | WIRED | Lines 23-25: iterates `cfgs`, calls `NewLayer(cfg, SampleRate, tau)` for each |
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| `synth/bank.go` | `synth/config.go` | `gainPerLayer` computed from `len(cfgs)` | WIRED | Line 21: `1.0 / float64(len(cfgs))` |
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---
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### Data-Flow Trace (Level 4)
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Not applicable. Phase 5 artifacts are synthesis engine components (type definitions, pure functions, struct methods) — not UI components or pages that render dynamic data from an external source. Data flow is exercised directly by the test suite.
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---
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### Behavioral Spot-Checks
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| Behavior | Command | Result | Status |
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|----------|---------|--------|--------|
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| All synth tests pass including new waveform tests | `go test ./synth/... -v -count=1` | 30 tests pass, 0 failures | PASS |
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| Full project builds without errors | `go build ./...` | Exit 0, no output | PASS |
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| go vet finds no issues | `go vet ./synth/... ./encode/...` | Exit 0, no output | PASS |
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| Full test suite passes | `go test ./...` | 6 packages pass, 0 failures | PASS |
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---
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### Requirements Coverage
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| Requirement | Source Plan | Description | Status | Evidence |
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|-------------|-------------|-------------|--------|----------|
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| WAVE-01 | 05-01, 05-02 | User can set waveform type per traffic class (sine, square, sawtooth, triangle) | SATISFIED | `WaveformType` field on `FreqConfig`; `NewBank` accepts any config map with any `WaveformType` per entry; waveform resolution in `NewLayer` |
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| WAVE-02 | 05-01, 05-02 | Non-sine waveforms use bandlimited additive synthesis (no aliasing artifacts) | SATISFIED | `WaveformPresetHarmonics` loops terminate at `float64(k)*baseHz < nyquist`; `TestBandlimitedHarmonicsNoAliasing` verifies no harmonic exceeds 22050 Hz across all base frequencies |
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No orphaned requirements: REQUIREMENTS.md traceability table maps WAVE-01 and WAVE-02 to Phase 5 only; both are covered.
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---
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### Anti-Patterns Found
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None. Grep scan of all phase-modified files (`synth/config.go`, `synth/layer.go`, `synth/bank.go`, `synth/waveform_test.go`, `synth/bank_test.go`, `synth/config_test.go`, `encode/mp3.go`) found no TODO/FIXME/placeholder comments, no empty implementations, no hardcoded empty returns, and no stubbed handlers.
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| File | Line | Pattern | Severity | Impact |
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|------|------|---------|----------|--------|
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| — | — | — | — | — |
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---
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### Human Verification Required
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None. All phase-5 behaviors are exercised by automated tests with deterministic numeric assertions. No visual rendering, real-time playback, or external service integration was introduced.
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---
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### Gaps Summary
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No gaps. All 12 must-have truths are verified. Both requirement IDs (WAVE-01, WAVE-02) are satisfied. The full test suite passes with zero failures across all packages.
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---
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_Verified: 2026-03-26_
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_Verifier: Claude (gsd-verifier)_
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