Grant Gilliam fd7e1a5907 Phase 1: dual-track audio capture → mixed-mono 16 kHz WAV + mic VAD
AudioRecorder captures system audio (ScreenCaptureKit) + mic (AVAudioEngine) on a
single serial ioQueue, one shared monotonic t0, time-driven writers (pad gaps /
trim overlaps) so tracks stay aligned, and an energy mic-VAD for 'self' spans.
AudioMixer sums the aligned tracks into mixed_mono_16k.wav. SessionController
drives a serialized start/stop state machine, writes the session folder +
self_vad.json, exposes live level meters, and finalizes on quit.

Hardening from review: ioQueue single-domain (no races), stop() never hangs
(mic-first teardown + bounded stopCapture), layout-agnostic mic deep-copy,
discard-only video output to keep SCStream alive, VAD lockstep on committed
frames, stable signing team in project.yml, single-instance enforcement.
2026-06-05 21:30:11 -05:00

Ten31 Transcripts

Native macOS menu-bar app that auto-detects conference calls, records local audio, builds a visual-derived speaker timeline, and hands audio + timeline to the SparkControl backend for naming/transcription. See docs/ for the full spec.

This repo is at Phase 0 (scaffold, permissions, backend health check).

One-time setup

  1. Install Xcode from the Mac App Store (free; ~40 GB). Open it once and accept the license prompt.
  2. Install XcodeGen (generates the Xcode project from project.yml):
    brew install xcodegen
    
  3. Generate the project:
    xcodegen generate
    
    This creates Ten31Transcripts.xcodeproj (git-ignored — regenerate any time).
  4. Open it:
    open Ten31Transcripts.xcodeproj
    
  5. Signing is preconfigured: project.yml sets DEVELOPMENT_TEAM to the free personal team BK4Y6CXN35 with automatic signing, so Signing & Capabilities should already show the team — no manual selection needed. (If you ever sign with a different Apple ID, update DEVELOPMENT_TEAM in project.yml, not in Xcode — xcodegen generate overwrites Xcode-side changes.)
  6. Press Run (⌘R).

Note: after adding files in a new phase, re-run xcodegen generate and let Xcode reload the project. The signing team persists because it lives in project.yml, so macOS permissions stay granted across rebuilds.

What Phase 0 does

  • Launches as a menu-bar-only app (no Dock icon).
  • Menu panel shows live status for the three permissions it needs — Microphone, Screen Recording, Accessibility — with Grant / Open Settings buttons.
  • Shows a backend health check (GET /api/status) against the configured host.
  • Settings: backend base URL, skip-TLS toggle (on by default for the self-signed cert), output folder, and adapter toggles (inert this phase).

No audio capture, call detection, screen reading, or backend hand-off yet — those arrive in Phases 16 (docs/04_BUILD_PLAN.md).

Project layout

project.yml                     # XcodeGen recipe → generates the .xcodeproj
Ten31Transcripts/
  App/        Ten31TranscriptsApp.swift, AppDelegate.swift
  UI/         MenuBarView, SettingsView, PermissionRow
  Permissions/PermissionsManager.swift
  Backend/    SparkControlHealth.swift, InsecureTrustDelegate.swift
  Settings/   AppSettings.swift
  Support/    Info.plist, Ten31Transcripts.entitlements
Ten31TranscriptsTests/          # placeholder; real tests land in Phase 3

Notes

  • App Sandbox is off and Hardened Runtime is off — this is a personal, LAN-only tool that must observe other apps. Revisit only if distributing.
  • The default backend host is https://your-spark-backend.local:62419 (editable in Settings).
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