martin

Privacy-first meeting transcriber for Linux. Records microphone and system audio, transcribes locally with Whisper, stores results in SQLite. No cloud, no internet — your audio never leaves your machine.

Screenshots

Features

• Dual audio capture — records microphone + system audio (browser, Zoom, Meet) via PipeWire
• Local transcription — Whisper runs on your machine, no internet needed
• Bilingual UI — Portuguese and English, follows system locale
• Transcription history — browse, view, copy, and delete past transcriptions
• AI summary — summarize transcriptions with key points via Claude Code CLI
• Privacy first — audio files deleted after transcription, data stays in local SQLite

Requirements

• Linux with PipeWire (Ubuntu 22.10+, Fedora 36+, etc.)
• pw-record and wpctl (included with PipeWire)
• Rust 1.70+
• Node.js 18+

System dependencies

# Ubuntu/Debian
sudo apt install -y libwebkit2gtk-4.1-dev libgtk-3-dev libasound2-dev libpulse-dev \
  build-essential libssl-dev libayatana-appindicator3-dev librsvg2-dev pipewire

Install

git clone https://github.com/YOUR_USER/martin.git
cd martin
npm install
cargo install tauri-cli --version "^2"
./scripts/download-model.sh small
cargo tauri build

The binary will be in src-tauri/target/release/martin.

Usage

1. Open martin
2. Click Start Recording / Iniciar Gravação
3. Have your meeting — both your mic and system audio are captured
4. Click Stop Recording / Parar Gravação
5. Click Transcribe / Transcrever — wait for local transcription
6. Done. Text is saved, audio is deleted.

How audio capture works

martin records two audio sources simultaneously:

• Microphone — captured via cpal (ALSA backend)
• System audio — captured via pw-record targeting the default PipeWire sink

When you stop recording, both WAV files are mixed into a single file and sent to Whisper. If PipeWire is not available, Martin falls back to microphone-only recording.

Whisper Models

Download with: ./scripts/download-model.sh <model>

Development

cargo tauri dev          # Full app dev mode with hot reload
cargo test               # Run Rust tests (29 tests)
npm run check            # Svelte/TypeScript type checking
cargo fmt                # Format Rust code
cargo clippy             # Lint Rust code

Architecture

src-tauri/src/
├── lib.rs              # Tauri commands, app state
├── audio/
│   ├── capture.rs      # Mic (cpal) + system audio (pw-record)
│   ├── mix.rs          # WAV mixing (mic + system → single file)
│   └── wav_writer.rs   # Thread-safe WAV writer
├── db/
│   └── store.rs        # SQLite CRUD for transcriptions
├── summarize.rs        # Claude CLI integration for AI summaries
└── transcribe/
    └── whisper.rs      # Whisper transcription + WAV loading + resampling

src/
├── lib/
│   ├── i18n.js         # Locale detection + translations (pt/en)
│   ├── Recorder.svelte # Recording controls
│   ├── History.svelte  # Transcription list
│   └── TranscriptionView.svelte
└── routes/
    └── +page.svelte    # Main page

License

GPLv3