---
phase: 04-polish-audio
plan: 04
subsystem: audio, ui
tags: [web-audio-api, web-speech-api, audio-integration, fire-and-forget]

# Dependency graph
requires:
  - phase: 04-polish-audio/04-01
    provides: "Audio module (sounds.ts, speech.ts) with playCorrectSound, playRewardSound, playForestElementSound, speakText"
  - phase: 04-polish-audio/04-02
    provides: "Enhanced animations (leaf-fall, stardust, companion float)"
  - phase: 04-polish-audio/04-03
    provides: "Export/import/reset functionality in parent area"
provides:
  - "Audio fully wired into lesson (correct keypress sound), reward (melody + speech), forest (element glitter sound), app (greeting speech)"
  - "Complete Phase 4 polish experience ready for end-user testing"
affects: []

# Tech tracking
tech-stack:
  added: []
  patterns:
    - "Fire-and-forget audio calls at interaction points (no await, no try/catch at call site)"

key-files:
  created: []
  modified:
    - src/ui/screens.ts
    - src/forest/reward.ts
    - src/forest/scene.ts
    - src/app.ts

key-decisions:
  - "Audio calls are fire-and-forget at all touch points -- sound/speech modules handle settings checks and errors internally"

patterns-established:
  - "Audio integration pattern: import sound function, call at interaction point, no error handling needed at call site"

requirements-completed: [PLSH-01, PLSH-02, PLSH-03, PLSH-04, PLSH-05, AUDI-01, AUDI-02, AUDI-03, AUDI-04, AUDI-05, PRNT-05, PRNT-06, PRNT-07]

# Metrics
duration: 1min
completed: 2026-03-29
---

# Phase 04 Plan 04: Audio Wiring Summary

**Web Audio sounds wired into lesson/reward/forest screens with Web Speech API for companion text readout**

## Performance

- **Duration:** 1 min
- **Started:** 2026-03-29T16:20:59Z
- **Completed:** 2026-03-29T16:22:00Z
- **Tasks:** 2 (1 auto + 1 checkpoint auto-approved)
- **Files modified:** 4

## Accomplishments
- playCorrectSound() fires on every correct keypress in both letter and word exercise modes
- playRewardSound() plays ascending melody when reward image appears, speakText() reads companion comment aloud
- playForestElementSound() triggers glitter sound when new forest element renders with animation
- speakText() reads companion greeting on forest screen for returning users

## Task Commits

Each task was committed atomically:

1. **Task 1: Wire audio + speech into lesson, reward, forest, and app** - `b453efe` (feat)
2. **Task 2: End-to-end verification of Phase 4** - auto-approved checkpoint

## Files Created/Modified
- `src/ui/screens.ts` - Added playCorrectSound import and calls in letter + word exercise keydown handlers
- `src/forest/reward.ts` - Added playRewardSound + speakText imports and calls in initRewardScreen
- `src/forest/scene.ts` - Added playForestElementSound import and call on new element render
- `src/app.ts` - Added speakText import and call for greeting text, sorted imports per biome rules

## Decisions Made
- Audio calls are fire-and-forget at all touch points -- sound/speech modules handle settings checks and errors internally

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered
None

## User Setup Required
None - no external service configuration required.

## Next Phase Readiness
- Phase 4 (polish-audio) is fully complete
- All audio, animation, responsive, error handling, and export/import features are wired and ready
- App is ready for end-user testing with the child

---
*Phase: 04-polish-audio*
*Completed: 2026-03-29*

## Self-Check: PASSED