98 lines
4.5 KiB
Markdown
98 lines
4.5 KiB
Markdown
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---
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phase: 2
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slug: audio-synthesis-engine
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status: draft
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nyquist_compliant: true
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wave_0_complete: true
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tdd_model: co-creation
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created: 2026-03-26
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---
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# Phase 2 — Validation Strategy
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> Per-phase validation contract for feedback sampling during execution.
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---
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## Test Infrastructure
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| Property | Value |
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|----------|-------|
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| **Framework** | go test (stdlib) |
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| **Config file** | none — existing Go test infrastructure |
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| **Quick run command** | `go test ./synth/... ./encode/...` |
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| **Full suite command** | `go test ./...` |
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| **Estimated runtime** | ~5 seconds |
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---
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## TDD Model
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This phase uses **co-creation TDD**: tests are written within the same task as the implementation, following RED-GREEN-REFACTOR within each task. All TDD tasks are marked with `tdd="true"` in their plan XML. Test files are created as part of the task, not as a separate Wave 0 plan.
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This is explicitly chosen over pre-existing stub TDD because:
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1. Each task's `<behavior>` block defines expected test cases before implementation begins
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2. The executor writes tests FIRST (RED), then implementation (GREEN) within the same task
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3. No test file exists before the task starts — the task creates both test and implementation
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Wave 0 requirements are limited to environment/tooling setup (gcc, ffprobe, go-lame dependency), handled by Plan 01 Task 1.
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---
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## Sampling Rate
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- **After every task commit:** Run `go test ./synth/... ./encode/...`
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- **After every plan wave:** Run `go test ./...`
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- **Before `/gsd:verify-work`:** Full suite must be green
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- **Max feedback latency:** 5 seconds
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---
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## Per-Task Verification Map
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| Task ID | Plan | Wave | Requirement | Test Type | Automated Command | TDD | Status |
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|---------|------|------|-------------|-----------|-------------------|-----|--------|
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| 02-01-01 | 01 | 1 | SYNTH-01 | setup | `go version && gcc --version && ffprobe -version && grep "go-lame" go.mod && CGO_ENABLED=1 go build ./...` | n/a | ⬜ pending |
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| 02-01-02 | 01 | 1 | SYNTH-01, SYNTH-02 | unit | `cd /home/dev/workspace/yoloyolo && go test ./synth/... -v -count=1` | co-creation | ⬜ pending |
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| 02-02-01 | 02 | 2 | SYNTH-03 | unit | `cd /home/dev/workspace/yoloyolo && go test ./synth/... -run "TestPan\|TestStereo\|TestClamp" -v -count=1` | co-creation | ⬜ pending |
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| 02-02-02 | 02 | 2 | SYNTH-03 | unit | `cd /home/dev/workspace/yoloyolo && go test ./synth/... -run "TestNewBank\|TestRenderWindow\|TestMixerNoClip\|TestStereoPan\|TestMultipleWindows" -v -count=1` | co-creation | ⬜ pending |
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| 02-03-01 | 03 | 3 | OUT-02, OUT-03 | integration | `cd /home/dev/workspace/yoloyolo && CGO_ENABLED=1 go test ./encode/... -v -count=1` | co-creation | ⬜ pending |
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| 02-03-02 | 03 | 3 | OUT-01 | build | `cd /home/dev/workspace/yoloyolo && go build -o /dev/null ./cmd/netsynth/ && go run ./cmd/netsynth/ --help 2>&1 \| grep -q "\-o.*output" && echo "OK"` | n/a | ⬜ pending |
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*Status: ⬜ pending · ✅ green · ❌ red · ⚠️ flaky*
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---
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## Wave 0 Requirements
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- [x] `gcc` — C compiler required for go-lame CGo compilation (Plan 01, Task 1)
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- [x] `ffprobe` — MP3 validation in acceptance tests (Plan 01, Task 1)
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- [x] `go get github.com/sjzar/go-lame@v0.0.9` — MP3 encoding dependency (Plan 01, Task 1)
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- [x] `go-audio/wav` — **Skipped.** Per CONTEXT.md Claude's Discretion grant; write PCM bytes directly to LameWriter (CLAUDE.md updated).
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*Test stubs are co-created with implementation in each TDD task (see TDD Model section above).*
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---
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## Manual-Only Verifications
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| Behavior | Requirement | Why Manual | Test Instructions |
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|----------|-------------|------------|-------------------|
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| Perceptually distinct drone tones per traffic class | SYNTH-01 | Subjective audio quality | Play output MP3, verify each class sounds distinct |
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| Amplitude rises/falls audibly with traffic volume | SYNTH-02 | Subjective perception | Listen for volume changes across windows with varying traffic |
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| Stereo panning creates spatial separation | SYNTH-03 | Subjective audio quality | Listen with headphones, verify bass center and highs spread |
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---
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## Validation Sign-Off
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- [x] All tasks have `<automated>` verify commands matching plan blocks
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- [x] Sampling continuity: no 3 consecutive tasks without automated verify (all tasks have automated verify)
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- [x] Wave 0 covers environment/tooling setup (Plan 01, Task 1)
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- [x] Co-creation TDD model documented; test expectations defined in `<behavior>` blocks
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- [x] No watch-mode flags
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- [x] Feedback latency < 5s
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- [x] `nyquist_compliant: true` set in frontmatter
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**Approval:** ready
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