t2t

Hold Fn key to record audio, release to transcribe and auto-paste.

How It Works

• Press and hold Fn key → records microphone audio
• Release Fn key → transcribes using a local Whisper model, copies to clipboard, and pastes automatically
• Visual feedback: red orb while recording, orange while processing

Setup

# Install dependencies
npm install

# Development
bun tauri dev

# Build
bun tauri build

Requirements

• Rust (install via rustup)
• Bun (recommended) or Node.js 18+
• macOS (currently macOS only; tested on Apple Silicon)

First Run

On first launch, the app automatically downloads the Whisper model (150MB) to `/.cache/whisper/ggml-base.en.bin`. This happens in the background.

Permissions (macOS)

Grant these in System Settings > Privacy & Security:

• Accessibility - Required for Fn key detection and focusing the correct field before paste
• Microphone - Required for audio recording

The app will prompt you if permissions are missing.

Tech Stack

• Frontend: Svelte 5 + SvelteKit
• Backend: Rust + Tauri
• STT: whisper-rs (local Whisper.cpp model)
• Hotkey: macOS event monitoring (Fn key) + fallbacks
• Audio capture: native (Rust via cpal)

Notes / Debugging

• Logs: ~/Library/Logs/t2t.log
• Model location: ~/.cache/whisper/ggml-base.en.bin

License

MIT